332354 + Interview Questions in Secondary School in Math Page 15 InterviewSolution

701.	(2) 6.0 Lulmal as 70 (4) 0.12% 1000 (3) 6000 got 60% marks in Maths and 3 marks less than Maths in Science. If the total marks how many marks he scored in Science? (1) 60.0 Sachin 90
Answer» Step-by-step EXPLANATION: xjxjxjxjzjzizuzurzuzuzurzuziJgamgatjatjsit

701.

(2) 6.0 Lulmal as 70 (4) 0.12% 1000 (3) 6000 got 60% marks in Maths and 3 marks less than Maths in Science. If the total marks how many marks he scored in Science? (1) 60.0 Sachin 90

Answer»

Step-by-step EXPLANATION:

xjxjxjxjzjzizuzurzuzuzurzuziJgamgatjatjsit

Discussion

702.	David was riding his bicycle at a speed of 26.0km per hour. use the fact that 1km is approximately equal to 0.6214miles to convert this speed to miles per hour(mile/h).round your answer to the nearest tenth.
Answer» Answer: kon class and CHAPTER AR MATH

702.

David was riding his bicycle at a speed of 26.0km per hour. use the fact that 1km is approximately equal to 0.6214miles to convert this speed to miles per hour(mile/h).round your answer to the nearest tenth.

Answer»

Answer:

kon class and CHAPTER AR MATH

Discussion

703.	Simplify:(i) [(2)^-1 + (4)^-1 + (3)^-1)^-1(ii) 49 × z^-3 / 7^3 ×10 ×z-5
Answer» Answer: 1) 9 2 z^2/70 HOPE it is CORRECT

703.

Simplify:(i) [(2)^-1 + (4)^-1 + (3)^-1)^-1(ii) 49 × z^-3 / 7^3 ×10 ×z-5

Answer»

Answer:

1) 9

2 z^2/70 HOPE it is CORRECT

Discussion

704.	Plz solve this question other wise you will be reported.
Answer» Step-by-step explanation: This is NCERT MATHS CHAPTER 2 EXERCISE 2.4 QUESTION 1 PART (I).

704.

Plz solve this question other wise you will be reported.

Answer»

Step-by-step explanation:

This is NCERT MATHS CHAPTER 2 EXERCISE 2.4 QUESTION 1 PART (I).

Discussion

705.	Bhavy gets interest at certain rate on the investment of Rs. 5000 and 2% higher rate on the investment of Rs 4000 if he gets Rs 1860 at the end of three years. Find out the rate of simple interest.
Answer» ANSWER: hdahdyditydkg तूर हरभरा तूर डाळीचा ढोकळा आहे तू हे पत्ता नाही तास अभ्यास आणि संशोधन केले आहेत ना त्या वेळी

705.

Bhavy gets interest at certain rate on the investment of Rs. 5000 and 2% higher rate on the investment of Rs 4000 if he gets Rs 1860 at the end of three years. Find out the rate of simple interest.

Answer»

ANSWER:

hdahdyditydkg तूर हरभरा तूर डाळीचा ढोकळा आहे तू हे पत्ता नाही तास अभ्यास आणि संशोधन केले आहेत ना त्या वेळी

Discussion

706.	Pls send me notes of fraction and decimals class 7th on [email protected] pls send urgently asap
Answer» Step-by-step explanation: FRACTIONS and DECIMALS- We have already studied about fractions and decimals. This chapter deals with the concept of multiplication and DIVISION of fractions as well as of decimals. A proper fraction is a fraction that represents a part of a whole. An improper fraction is a combination of a whole and a proper fraction. The first half of the chapter deals with the Multiplication of Fractions and the later part deals with the concept of Division of Fractions. Two fractions are multiplied by MULTIPLYING their numerators and denominators separately. Multiplication of fractions is sub-divided into the following topics: Multiplication of a fraction by a whole number Multiplication of a fraction by a fraction Before moving ONTO decimal numbers, the division of fractions is explained. This particular topic contains the following divisions: Division of whole number by a fraction Division of a fraction by a whole number Division of a fraction by another fraction The same operations are given for decimal numbers. Multiplication of decimal numbers Multiplication of decimal numbers by 10, 100, and 1000 Reciprocal of a fraction can be studied in this chapter wherein two non-zero numbers whose product with each other is 1 are called reciprocals of each other. Division of decimal numbers Division of decimal numbers by 10, 100, and 1000 Division of a decimal number by a whole number Division of a decimal number by another decimal number

706.

Pls send me notes of fraction and decimals class 7th on [email protected] pls send urgently asap

Answer»

Step-by-step explanation:

FRACTIONS and DECIMALS- We have already studied about fractions and decimals. This chapter deals with the concept of multiplication and DIVISION of fractions as well as of decimals.

A proper fraction is a fraction that represents a part of a whole.

An improper fraction is a combination of a whole and a proper fraction.

The first half of the chapter deals with the Multiplication of Fractions and the later part deals with the concept of Division of Fractions. Two fractions are multiplied by MULTIPLYING their numerators and denominators separately.

Multiplication of fractions is sub-divided into the following topics:

Multiplication of a fraction by a whole number

Multiplication of a fraction by a fraction

Before moving ONTO decimal numbers, the division of fractions is explained. This particular topic contains the following divisions:

Division of whole number by a fraction

Division of a fraction by a whole number

Division of a fraction by another fraction

The same operations are given for decimal numbers.

Multiplication of decimal numbers

Multiplication of decimal numbers by 10, 100, and 1000

Reciprocal of a fraction can be studied in this chapter wherein two non-zero numbers whose product with each other is 1 are called reciprocals of each other.

Division of decimal numbers

Division of decimal numbers by 10, 100, and 1000

Division of a decimal number by a whole number

Division of a decimal number by another decimal number

Discussion

707.	What is the binary number for 100? OR HAA THANKS
Answer» Answer: 1100100 is the BINARY NUMBER for 100.

707.

What is the binary number for 100? OR HAA THANKS

Answer»

Answer:

1100100 is the BINARY NUMBER for 100.

Discussion

708.	By what must 2 17/54 be multiplied to get -4 31/36 ?
Answer» ANSWER: एक कमरे में 10 लोग हैं. उनमें से एक को ज़ुकाम हुआ है. उनमें से आधे लोगों को एक घंटे बाद ज़ुकाम का इन्फेक्शन हो गया. तो बताइये, उनमे से कितने लोगों ज़ुकाम हुआ?

708.

By what must 2 17/54 be multiplied to get -4 31/36 ?

Answer»

ANSWER:

एक कमरे में 10 लोग हैं. उनमें से एक को ज़ुकाम हुआ है. उनमें से आधे लोगों को एक घंटे बाद ज़ुकाम का इन्फेक्शन हो गया. तो बताइये, उनमे से कितने लोगों ज़ुकाम हुआ?

Discussion

709.	The square root of 5+2√6 isplease answer fastly
Answer» Step-by-step explanation: 5+2 6 =5+(2. 3 . 2 ) =( 3 ) 2 +( 2 ) 2 +(2. 3 . 2 ) =( 3 + 2 ) 2 . Now, square ROOT of 5+2 6 is (( 3 + 2 ) 2 ) 2 1 =( 3 + 2 ).

709.

The square root of 5+2√6 isplease answer fastly

Answer»

Step-by-step explanation:

5+2

6

=5+(2.

3

.

2

)

=(

3

)

2

+(

2

)

2

+(2.

3

.

2

)

=(

3

+

2

)

2

.

Now, square ROOT of 5+2

6

is ((

3

+

2

)

2

)

2

1

=(

3

+

2

).

Discussion

710.	Sin( 45degree+theeta)- cos(45degree-theeta) Please answer my question
Answer» Answer: 2cos theeta is correct✅

710.

Sin( 45degree+theeta)- cos(45degree-theeta) Please answer my question

Answer»

Answer:

2cos theeta

is correct✅

Discussion

711.	Hey buddys help me again plz
Answer» ANSWER: I don't KNOW this answer

711.

Hey buddys help me again plz

Answer»

ANSWER:

I don't KNOW this answer

Discussion

712.	If the adjacent sides of a rectangle are (x³+y³) and ( x⁶-x³y³+y⁶) find its area
Answer» $\bold\blue{x⁹+y⁹}$ Step-by-step EXPLANATION: $Area= (x³+y³)( x⁶-x³y³+y⁶) \\ = {x}^{3}( x⁶-x³y³+y⁶) + {y}^{3} ( x⁶-x³y³+y⁶) \\ = {x}^{9} - {x}^{6} {y}^{3} + {x}^{3} {y}^{6} + {x}^{6} {y}^{3} - {x}^{3} {y}^{6} + {y}^{9} \\ = {x}^{9} + {y}^{9}$ I HOPE it HELPS you. MARK ME BRAINLIEST

712.

If the adjacent sides of a rectangle are (x³+y³) and ( x⁶-x³y³+y⁶) find its area

Answer»

$\bold\blue{x⁹+y⁹}$

Step-by-step EXPLANATION:

$Area= (x³+y³)( x⁶-x³y³+y⁶) \\ = {x}^{3}( x⁶-x³y³+y⁶) + {y}^{3} ( x⁶-x³y³+y⁶) \\ = {x}^{9} - {x}^{6} {y}^{3} + {x}^{3} {y}^{6} + {x}^{6} {y}^{3} - {x}^{3} {y}^{6} + {y}^{9} \\ = {x}^{9} + {y}^{9}$

I HOPE it HELPS you.

MARK ME BRAINLIEST

Discussion

713.	Plz give correct answer for it
Answer» ANSWER: a+B = -b/a aB=c/a it's the CORRECT answer

713.

Plz give correct answer for it

Answer»

ANSWER:

a+B = -b/a

aB=c/a

it's the CORRECT answer

Discussion

714.	Draw two 4 into 4 magic square table taking number in between 232 & 286
Answer» Answer: 33333. MARK ❣️ me as BRAIN LIST

714.

Draw two 4 into 4 magic square table taking number in between 232 & 286

Answer»

Answer:

33333. MARK ❣️ me as BRAIN LIST

Discussion

715.	The position of a body varies with time as x=3t^2-6t+7, then the particle turns around at.
Answer» Answer: Correct option is A 5 m The correct option is A. Given, X=t 2 −4t+6 So, the CHANGE in velocity is: dt dx =2t−4 Since velocity is changing, At t=0,x 1 =6 At t=2,x 2 =2 So the magnitude of the DISTANCE TRAVELED is: 6−2=4m At t=3,x 3 =3 So distance traveled from t=2s to t=3s x 3 −x 2 =3−2=1m Thus the total distance is:

715.

The position of a body varies with time as x=3t^2-6t+7, then the particle turns around at.

Answer»

Answer:

Correct option is

A

5 m

The correct option is A.

Given,

X=t

2

−4t+6

So, the CHANGE in velocity is:

dt

dx

=2t−4

Since velocity is changing,

At t=0,x

1

=6

At t=2,x

2

=2

So the magnitude of the DISTANCE TRAVELED is:

6−2=4m

At t=3,x

3

=3

So distance traveled from t=2s to t=3s

x

3

−x

2

=3−2=1m

Thus the total distance is:

Discussion

716.	11. How many match-boxes can be placed in a box of size 45 cm x 20 cm x 15 cm, if thesize of each match-box is 3 cm x 2 cm x 1.5 cm?12. The perimeter of a room is 28 m and its height is 2.5 m. Find the cost of whitewashingits walls at the rate of 25 per square metre.
Answer» ANSWER: FIRST make me BRAINLIEST PLEASE then I will TELL you answer

716.

11. How many match-boxes can be placed in a box of size 45 cm x 20 cm x 15 cm, if thesize of each match-box is 3 cm x 2 cm x 1.5 cm?12. The perimeter of a room is 28 m and its height is 2.5 m. Find the cost of whitewashingits walls at the rate of 25 per square metre.

Answer»

ANSWER:

FIRST make me BRAINLIEST PLEASE then I will TELL you answer

Discussion

717.	If vector B equal vector q then which of the following is not correct?a) P cap= Q capb) \|vector P\|=\|Q\|c) PQ cap=QP capd) vector P+vector Q=P cap +Q cap
Answer» ANSWER: SORRY for not RESPONDING

717.

If vector B equal vector q then which of the following is not correct?a) P cap= Q capb) |vector P|=|Q|c) PQ cap=QP capd) vector P+vector Q=P cap +Q cap

Answer»

ANSWER:

SORRY for not RESPONDING

Discussion

718.	5:00 से प्रारंभ करें और घड़ी की दिशा में एक बटा दो खुराना ना करें
Answer» ANSWER: uyeh या दोन गोष्टी साध्य होईल उ व त्या कबरीच्या व ते

718.

5:00 से प्रारंभ करें और घड़ी की दिशा में एक बटा दो खुराना ना करें

Answer»

ANSWER:

uyeh या दोन गोष्टी साध्य होईल उ व त्या कबरीच्या व ते

Discussion

719.	Xy and xz meet at x. this is full Q
Answer» ANSWER: hhahahahahahajajahahahah

719.

Xy and xz meet at x. this is full Q

Answer»

ANSWER:

hhahahahahahajajahahahah

Discussion

720.	Please Answer the qns no. 10
Answer» ANSWER: Step-by-step EXPLANATION:

720.

Please Answer the qns no. 10

Answer»

ANSWER:

Step-by-step EXPLANATION:

Discussion

721.	add 900 to this number use the digit number 0,1,2,3,4,5,6,7,and 9 to make a 7 digit number each time
Answer» ANSWER: vkcvnjv BKI hjbbjjnbjoo

721.

add 900 to this number use the digit number 0,1,2,3,4,5,6,7,and 9 to make a 7 digit number each time

Answer»

ANSWER:

vkcvnjv BKI hjbbjjnbjoo

Discussion

722.	Express the following as a fraction.(i )120%
Answer» Answer: 6/5 Step-by-step EXPLANATION: EASY 120/100 =12/10=6/5

722.

Express the following as a fraction.(i )120%

Answer»

Answer:

6/5

Step-by-step EXPLANATION:

EASY 120/100 =12/10=6/5

Discussion

723.	If sinA+sin^2=1, then the value of (cos^2a+cos^2a) plz solve this
Answer» ꯃꯐꯘꯃꯘ꯫ ꯳꯱꯴꯵꯱ ꯝꯐꯐꯜꯎꯥꯩꯪꯑ ꯌꯉꯌꯉꯌꯞꯉ ꯔꯉꯔꯔꯉ ꯇꯥꯌ ꯊꯉꯔ 21 ꯌꯐꯞ ꯄꯔꯝꯑꯗ069

723.

If sinA+sin^2=1, then the value of (cos^2a+cos^2a) plz solve this

Answer»

ꯃꯐꯘꯃꯘ꯫ ꯳꯱꯴꯵꯱ ꯝꯐꯐꯜꯎꯥꯩꯪꯑ ꯌꯉꯌꯉꯌꯞꯉ

ꯔꯉꯔꯔꯉ ꯇꯥꯌ ꯊꯉꯔ 21 ꯌꯐꯞ ꯄꯔꯝꯑꯗ069

Discussion

724.	Answer de do brainlaiest banunga
Answer» ANSWER: this is the✅ answer for your QUESTION

724.

Answer de do brainlaiest banunga

Answer»

ANSWER:

this is the✅ answer for your QUESTION

Discussion

725.	which of the the following pairs of numbers can be listed as coprime options 14,84 16,25 13,49 14,84
Answer» Answer: 13 is a COPRIME there have no FACTORS

725.

which of the the following pairs of numbers can be listed as coprime options 14,84 16,25 13,49 14,84

Answer»

Answer:

13 is a COPRIME there have no FACTORS

Discussion

726.	State which of the following statement are true.1) { } = 02) 0=03) 0={ }please say the answer
Answer» Answer: 0=0 because LHS is EQUAL to RHS

726.

State which of the following statement are true.1) { } = 02) 0=03) 0={ }please say the answer

Answer»

Answer:

0=0 because LHS is EQUAL to RHS

Discussion

727.	A piece of cloth 325 m long is cut and reduced to 65m what is percentage decrease in length
Answer» Answer: As everyone answered. You have "x" THINGS and you WANT divide them into "y" equal PARTS, then size of each part is simply "x divided by y". x = 5.20 m y = 20 parts x/y = 5.20 m/ 20 parts = 0.26 m/part So each piece is 0.26 m in length. 26 cm, that is! Thanks.

727.

A piece of cloth 325 m long is cut and reduced to 65m what is percentage decrease in length

Answer»

Answer:

As everyone answered. You have "x" THINGS and you WANT divide them into "y" equal PARTS, then size of each part is simply "x divided by y".

x = 5.20 m

y = 20 parts

x/y = 5.20 m/ 20 parts = 0.26 m/part

So each piece is 0.26 m in length. 26 cm, that is! Thanks.

Discussion

728.	Guys it's urgent..what is 32+32÷16=please help me guys.
Answer» ANSWER: HELLO GUYS fine everybody SANCHAI

728.

Guys it's urgent..what is 32+32÷16=please help me guys.

Answer»

ANSWER:

HELLO GUYS fine everybody SANCHAI

Discussion

729.	1. Write first 3 multiples of following numbers. (i) 3 and 4 (ii) 5 and 10 (iii) 8 and 12
Answer» Answer: i) 3 and 4- 12,24,36.... II) 5 and 10- 10,20,30... iii) 8 and 12- 24,48,72.... Hope it's helpful to you

729.

1. Write first 3 multiples of following numbers. (i) 3 and 4 (ii) 5 and 10 (iii) 8 and 12

Answer»

Answer:

i) 3 and 4- 12,24,36....

II) 5 and 10- 10,20,30...

iii) 8 and 12- 24,48,72....

Hope it's helpful to you

Discussion

730.	in angle abc,angle a =76Digree and angle b=48digree then angle c=? option a 66diger B is56digree c is 124digree d is 28digree
Answer» GIVEN:- ∠B=76° ∠C=48° ∠A=? As we KNOW that, SUM of all ANGLES of a TRIANGLE is 180°. ∴∠A+∠B+∠C=180° ⇒∠A+76°+48°=180° ⇒∠A+124°=180° ⇒∠A=180°−124° ⇒∠A=56°

730.

in angle abc,angle a =76Digree and angle b=48digree then angle c=? option a 66diger B is56digree c is 124digree d is 28digree

Answer»

GIVEN:-

∠B=76°

∠C=48°

∠A=?

As we KNOW that, SUM of all ANGLES of a TRIANGLE is 180°.

∴∠A+∠B+∠C=180°

⇒∠A+76°+48°=180°

⇒∠A+124°=180°

⇒∠A=180°−124°

⇒∠A=56°

Discussion

731.	2/3 of 1/2 please answer
Answer» ANSWER: Hey!! Ur answer: $\frac{2}{3} \times \frac{1}{2} \\ = \frac{1}{3}$ Step-by-step EXPLANATION: Hope it HELPS u!! Please MARK me Brainliest✌ *Keep* *Rocking*~ #BLADEGIRL

731.

2/3 of 1/2 please answer

Answer»

ANSWER:

Hey!! Ur answer:

$\frac{2}{3} \times \frac{1}{2} \\ = \frac{1}{3}$

Step-by-step EXPLANATION:

Hope it HELPS u!! Please MARK me Brainliest✌

Keep Rocking~

#BLADEGIRL

Discussion

732.	The shapes shown below are sketches. Construct these shapes accurately. Measure the length of x in each shape you have drawn. 1 2 37 mm X 48 mm 54° 43 mm
Answer» Step-by-step EXPLANATION: dktuxfhxtykcgh GH! HF jgvui ghjlguo fu ifyi doufouguiv?gjctuc jlgiylfui vyicyi chj cughludut

732.

The shapes shown below are sketches. Construct these shapes accurately. Measure the length of x in each shape you have drawn. 1 2 37 mm X 48 mm 54° 43 mm

Answer»

Step-by-step EXPLANATION:

dktuxfhxtykcgh GH! HF jgvui

ghjlguo

fu

ifyi

doufouguiv?gjctuc

jlgiylfui

vyicyi

chj

cughludut

Discussion

733.	Two dice are thrown simultaneously. What is the probability of getting a 3 or an even number?
Answer» ANSWER: =13 Step-by-step EXPLANATION: HOPE this HELPED you.

733.

Two dice are thrown simultaneously. What is the probability of getting a 3 or an even number?

Answer»

ANSWER:

=13

Step-by-step EXPLANATION:

HOPE this HELPED you.

Discussion

734.	Which number is Greatest and Smallest number 1902 : 1920 : 9021 : 9210You will answer this question I will make a brainlest
Answer» Step-by-step explanation: 1902 is SMALLER than 1920 and 9021 is smaller than 9210

734.

Which number is Greatest and Smallest number 1902 : 1920 : 9021 : 9210You will answer this question I will make a brainlest

Answer»

Step-by-step explanation:

1902 is SMALLER than 1920 and 9021 is smaller than 9210

Discussion

735.	Prove that the four triangles formed by joining the midpoints of the sides of a parallelogram are congruent to each other.
Answer» ANSWER: HELLO! Contact me To Get The ANSWERS Contact Me : [email PROTECTED] Link : I will be given Through The GMAIL.

735.

Prove that the four triangles formed by joining the midpoints of the sides of a parallelogram are congruent to each other.

Answer»

ANSWER:

HELLO! Contact me To Get The ANSWERS

Contact Me :

[email PROTECTED]

Link :

I will be given Through The GMAIL.

Discussion

736.	Find the missing number. first row 1 2 1 ; second row 1 4 4; third row 1 6 ?; fourth row 1 9 6
Answer» ANSWER: SORRY I don't KNOW this answer

736.

Find the missing number. first row 1 2 1 ; second row 1 4 4; third row 1 6 ?; fourth row 1 9 6

Answer»

ANSWER:

SORRY I don't KNOW this answer

Discussion

737.	If A,B and C are mutually independent events then show that AUB and C are independent events ..Faster reply please
Answer» ANSWER: SORRY I don't KNOW this answer

737.

If A,B and C are mutually independent events then show that AUB and C are independent events ..Faster reply please

Answer»

ANSWER:

SORRY I don't KNOW this answer

Discussion

738.	Pls and answer both parts in detail
Answer» $\large\underline{\sf{Given \:Question - }}$ Prove that $\sf \: \: (1). \: \: sin2x + 2sin4x + sin6x = 4 {cos}^{2}xsin4x$ $\sf \: \: (2). \: \: cos\bigg(\dfrac{3\pi}{4} + x \bigg) - cos\bigg(\dfrac{3\pi}{4} - x\bigg) = - \: \sqrt{2} \: sinx$ $\large\underline{\sf{Solution-1}}$ Consider, $\rm :\longmapsto\:sin2x + 2sin4x + sin6x$ can be re-arranged as $\rm \: = \:(sin6x + sin2x) + 2sin4x$ We know, $\boxed{ \bf{ \: sinx + siny = 2sin\bigg(\dfrac{x + y}{2} \bigg)cos\bigg(\dfrac{x - y}{2} \bigg)}}$ Using this identity, we get $\rm \: = \:2sin\bigg(\dfrac{6x + 2x}{2} \bigg)cos\bigg(\dfrac{6x - 2x}{2} \bigg) + 2sin4x$ $\rm \: = \:2sin\bigg(\dfrac{8x}{2} \bigg)cos\bigg(\dfrac{4x}{2} \bigg) + 2sin4x$ $\rm \: = \:2sin4xcos2x + 2sin4x$ $\rm \: = \:2sin4x(1 + cos2x)$ We know, $\boxed{ \bf{ \: 1 + cos2x = {2cos}^{2}x}}$ $\rm \: = \:2sin4x(2 {cos}^{2}x)$ $\rm \: = \:4sin4x \: {cos}^{2}x$ HENCE, $\boxed{ \bf{ \: sin2x + 2sin4x + sin6x = 4 {cos}^{2}xsin4x}}$ $\red{\large\underline{\sf{Solution-2}}}$ Consider, $\rm :\longmapsto\: cos\bigg(\dfrac{3\pi}{4} + x \bigg) - cos\bigg(\dfrac{3\pi}{4} - x\bigg)$ We know, $\boxed{ \bf{ \: cosx - cosy = - \: 2sin\bigg(\dfrac{x + y}{2} \bigg)sin\bigg(\dfrac{x - y}{2} \bigg)}}$ Using this identity, we get $\rm \: = \: - 2sin\bigg(\dfrac{\dfrac{3\pi}{4} + x + \dfrac{3\pi}{4} - x}{2} \bigg)sin\bigg(\dfrac{\dfrac{3\pi}{4} + x - \dfrac{3\pi}{4} + x}{2} \bigg)$ $\rm \: = \: - 2sin\bigg(\dfrac{\dfrac{3\pi}{4} + \dfrac{3\pi}{4} }{2} \bigg)sin\bigg(\dfrac{x + x}{2} \bigg)$ $\rm \: = \: - 2sin\bigg(\dfrac{2 \times \dfrac{3\pi}{4} }{2} \bigg)sin\bigg(\dfrac{2x}{2} \bigg)$ $\rm \: = \: - 2sin\bigg(\dfrac{3\pi}{4} \bigg)sinx$ $\rm \: = \: - 2sin\bigg(\pi - \dfrac{\pi}{4} \bigg)sinx$ $\rm \: = \: - 2sin\bigg(\dfrac{\pi}{4} \bigg)sinx$ $\rm \: = \: - 2 \times \dfrac{1}{ \sqrt{2} } \times sinx$ $\rm \: = \: - \sqrt{2} \times \sqrt{2} \times \dfrac{1}{ \sqrt{2} } \times sinx$ $\rm \: = \: - \sqrt{2} \: sinx$ Hence, $\boxed{ \bf{ \: cos\bigg(\dfrac{3\pi}{4} + x \bigg) - cos\bigg(\dfrac{3\pi}{4} - x\bigg) = - \: \sqrt{2} \: sinx}}$ ADDITIONAL INFORMATION :- $\boxed{ \bf{ \: sinx - siny = 2cos\bigg(\dfrac{x + y}{2} \bigg)sin\bigg(\dfrac{x - y}{2} \bigg)}}$ $\boxed{ \bf{ \: cosx + cosy = 2cos\bigg(\dfrac{x + y}{2} \bigg)cos\bigg(\dfrac{x - y}{2} \bigg)}}$ $\boxed{ \bf{ \: 2cosxcosy = cos(x + y) + cos(x - y)}}$ $\boxed{ \bf{ \: 2sinxsiny = cos(x - y) - cos(x + y)}}$ $\boxed{ \bf{ \: 2sinxcosy = sin(x + y) + sin(x - y)}}$

738.

Pls and answer both parts in detail

Answer»

$\large\underline{\sf{Given \:Question - }}$

Prove that

$\sf \: \: (1). \: \: sin2x + 2sin4x + sin6x = 4 {cos}^{2}xsin4x$

$\sf \: \: (2). \: \: cos\bigg(\dfrac{3\pi}{4} + x \bigg) - cos\bigg(\dfrac{3\pi}{4} - x\bigg) = - \: \sqrt{2} \: sinx$

$\large\underline{\sf{Solution-1}}$

Consider,

$\rm :\longmapsto\:sin2x + 2sin4x + sin6x$

can be re-arranged as

$\rm \: = \:(sin6x + sin2x) + 2sin4x$

We know,

$\boxed{ \bf{ \: sinx + siny = 2sin\bigg(\dfrac{x + y}{2} \bigg)cos\bigg(\dfrac{x - y}{2} \bigg)}}$

Using this identity, we get

$\rm \: = \:2sin\bigg(\dfrac{6x + 2x}{2} \bigg)cos\bigg(\dfrac{6x - 2x}{2} \bigg) + 2sin4x$

$\rm \: = \:2sin\bigg(\dfrac{8x}{2} \bigg)cos\bigg(\dfrac{4x}{2} \bigg) + 2sin4x$

$\rm \: = \:2sin4xcos2x + 2sin4x$

$\rm \: = \:2sin4x(1 + cos2x)$

We know,

$\boxed{ \bf{ \: 1 + cos2x = {2cos}^{2}x}}$

$\rm \: = \:2sin4x(2 {cos}^{2}x)$

$\rm \: = \:4sin4x \: {cos}^{2}x$

HENCE,

$\boxed{ \bf{ \: sin2x + 2sin4x + sin6x = 4 {cos}^{2}xsin4x}}$

$\red{\large\underline{\sf{Solution-2}}}$

Consider,

$\rm :\longmapsto\: cos\bigg(\dfrac{3\pi}{4} + x \bigg) - cos\bigg(\dfrac{3\pi}{4} - x\bigg)$

We know,

$\boxed{ \bf{ \: cosx - cosy = - \: 2sin\bigg(\dfrac{x + y}{2} \bigg)sin\bigg(\dfrac{x - y}{2} \bigg)}}$

Using this identity, we get

$\rm \: = \: - 2sin\bigg(\dfrac{\dfrac{3\pi}{4} + x + \dfrac{3\pi}{4} - x}{2} \bigg)sin\bigg(\dfrac{\dfrac{3\pi}{4} + x - \dfrac{3\pi}{4} + x}{2} \bigg)$

$\rm \: = \: - 2sin\bigg(\dfrac{\dfrac{3\pi}{4} + \dfrac{3\pi}{4} }{2} \bigg)sin\bigg(\dfrac{x + x}{2} \bigg)$

$\rm \: = \: - 2sin\bigg(\dfrac{2 \times \dfrac{3\pi}{4} }{2} \bigg)sin\bigg(\dfrac{2x}{2} \bigg)$

$\rm \: = \: - 2sin\bigg(\dfrac{3\pi}{4} \bigg)sinx$

$\rm \: = \: - 2sin\bigg(\pi - \dfrac{\pi}{4} \bigg)sinx$

$\rm \: = \: - 2sin\bigg(\dfrac{\pi}{4} \bigg)sinx$

$\rm \: = \: - 2 \times \dfrac{1}{ \sqrt{2} } \times sinx$

$\rm \: = \: - \sqrt{2} \times \sqrt{2} \times \dfrac{1}{ \sqrt{2} } \times sinx$

$\rm \: = \: - \sqrt{2} \: sinx$

Hence,

$\boxed{ \bf{ \: cos\bigg(\dfrac{3\pi}{4} + x \bigg) - cos\bigg(\dfrac{3\pi}{4} - x\bigg) = - \: \sqrt{2} \: sinx}}$

ADDITIONAL INFORMATION :-

$\boxed{ \bf{ \: sinx - siny = 2cos\bigg(\dfrac{x + y}{2} \bigg)sin\bigg(\dfrac{x - y}{2} \bigg)}}$

$\boxed{ \bf{ \: cosx + cosy = 2cos\bigg(\dfrac{x + y}{2} \bigg)cos\bigg(\dfrac{x - y}{2} \bigg)}}$

$\boxed{ \bf{ \: 2cosxcosy = cos(x + y) + cos(x - y)}}$

$\boxed{ \bf{ \: 2sinxsiny = cos(x - y) - cos(x + y)}}$

$\boxed{ \bf{ \: 2sinxcosy = sin(x + y) + sin(x - y)}}$

Discussion

739.	Sum of ages of sejal and sonal is 30 years. sejal is older than sonal by 2 years. find the age of sejal
Answer» Step-by-step EXPLANATION: SEGAL and sonal = 30 YEARS 30÷2 =15 years old SEJAL

739.

Sum of ages of sejal and sonal is 30 years. sejal is older than sonal by 2 years. find the age of sejal

Answer»

Step-by-step EXPLANATION:

SEGAL and sonal = 30 YEARS

30÷2

=15 years old SEJAL

Discussion

740.	Simplify: (i)
Answer» ANSWER: Answer is 6 Step-by-step EXPLANATION: $2 \frac{2}{3} \times 2 \frac{1}{3}$ $\frac{8}{3} \times \frac{7}{3}$ $\frac{ {8×7}}{3×3}$ $\frac{ \cancel{56}}{\cancel9}$ $6$

740.

Simplify: (i)

Answer»

ANSWER:

Answer is 6

Step-by-step EXPLANATION:

$2 \frac{2}{3} \times 2 \frac{1}{3}$

$\frac{8}{3} \times \frac{7}{3}$

$\frac{ {8×7}}{3×3}$

$\frac{ \cancel{56}}{\cancel9}$

$6$

Discussion

741.	Write the expand form and place value for this number 18950048 in international numbers with commasYou will answer this I make them as brainlest
Answer» Answer: 10000000+8000000+900000+50000+0+0+40+8. 18,950,048

741.

Write the expand form and place value for this number 18950048 in international numbers with commasYou will answer this I make them as brainlest

Answer»

Answer:

10000000+8000000+900000+50000+0+0+40+8. 18,950,048

Discussion

742.	Square root of the equation
Answer» PLEASE MARK as BRAINLIST

Discussion

743.	If one angle of a parallelogram is 60° find the other angels
Answer» Answer: In the FIGURE : ABCD is a parallelogram. ∠DAB = 60° In a parallelogram , OPPOSITE angles are EQUAL . ∴∠DAB =∠DCB =60°

743.

If one angle of a parallelogram is 60° find the other angels

Answer»

Answer:

In the FIGURE : ABCD is a parallelogram. ∠DAB = 60° In a parallelogram , OPPOSITE angles are EQUAL . ∴∠DAB =∠DCB =60°

Discussion

744.	सू रेडफर्न (मैदान पर) टिम रॉबिन्सन (मैदान पर) स्टुअर्ट कमिंग (रेफरी)
Answer» ANSWER: सू रेडफर्न (मैदान पर) टिम रॉबिन्सन (मैदान पर) स्टुअर्ट कमिंग (रेफरी)

744.

सू रेडफर्न (मैदान पर) टिम रॉबिन्सन (मैदान पर) स्टुअर्ट कमिंग (रेफरी)

Answer»

ANSWER:

सू रेडफर्न (मैदान पर) टिम रॉबिन्सन (मैदान पर) स्टुअर्ट कमिंग (रेफरी)

Discussion

745.	3. If A and B are any two sets with some common elements and n(A)
Answer» LET A={a,b,c,d,e} and B={1,2,3,4} A×B=(a,1),(a,2),(a,3),(a,4),(b,1),(b,2),(b,3),(b,4),(c,1),(c,2),(c,3),(c,4),(d,1),(d,2),(d,3),(d,4),(e,1),(e,2),(e,3),(e,4) ∴n(A×B)=n(A)n(B)=20 We know that (A×B)∩(B×A)=(A∩B)×(B∩A) So,(A×B)∩(B×A)=(A∩B)×(B∩A) Given:Common ELEMENTS of A and B=3 ∴n(A∩B)=3 So,n[(A∩B)×(B∩A)]=n(A∩B)n(B∩A)=3×3=9 elements ∴n[(A∩B)×(B∩A)]=9 elements Mark the brainliest and follow.

745.

3. If A and B are any two sets with some common elements and n(A)

Answer»

LET A={a,b,c,d,e}

and B={1,2,3,4}

A×B=(a,1),(a,2),(a,3),(a,4),(b,1),(b,2),(b,3),(b,4),(c,1),(c,2),(c,3),(c,4),(d,1),(d,2),(d,3),(d,4),(e,1),(e,2),(e,3),(e,4)

∴n(A×B)=n(A)n(B)=20

We know that (A×B)∩(B×A)=(A∩B)×(B∩A)

So,(A×B)∩(B×A)=(A∩B)×(B∩A)

Given:Common ELEMENTS of A and B=3

∴n(A∩B)=3

So,n[(A∩B)×(B∩A)]=n(A∩B)n(B∩A)=3×3=9 elements

∴n[(A∩B)×(B∩A)]=9 elements

Mark the brainliest and follow.

Discussion

746.	If x + y + z = 7 and xy + yz + zx = 6, findx² + y² + z²
Answer» ANSWER: Step-by-step EXPLANATION:

746.

If x + y + z = 7 and xy + yz + zx = 6, findx² + y² + z²

Answer»

ANSWER:

Step-by-step EXPLANATION:

Discussion

747.	Reduce the following fractions to their lowest terms (1) 35/70(2) 4/26(3) 10/26
Answer» Answer: 1) 1/2 2) 0.15384615384 3)0.38461538461

747.

Reduce the following fractions to their lowest terms (1) 35/70(2) 4/26(3) 10/26

Answer»

Answer:

1) 1/2

2) 0.15384615384

3)0.38461538461

Discussion

748.	If x=m-2 and x/m - x+1/m =1 ,find m
Answer» ANSWER: ANSWER IS 0 Step-by-step EXPLANATION: *GIVE* ME THANKS AND MARK ME AS BRAINLIEST

748.

If x=m-2 and x/m - x+1/m =1 ,find m

Answer»

ANSWER:

ANSWER IS 0

Step-by-step EXPLANATION:

GIVE ME THANKS AND MARK ME AS BRAINLIEST

Discussion

749.	4. Observe the histogram given below. The number of girls having height 145 cm and above isplease answer this fast please help me
Answer» Answer: No. Of girls having height more than 145 CM = 5 + 4 + 1 = 10

749.

4. Observe the histogram given below. The number of girls having height 145 cm and above isplease answer this fast please help me

Answer»

Answer:

No. Of girls having height more than 145 CM = 5 + 4 + 1 = 10

Discussion

750.	15/24 is an equivalent fraction of a/b. If a = 75, what is the value of b ? * 8 120 96 100
Answer» Answer: hi, I'm SURE that the right place. . only one I had the right place. the H.C.F, but the only THING is that I am searching Step-by-step explanation: quote from you, I have been a bit more than HAPPY with this GOOD of of of my favourite. the H.C.F, I will have to face with the FIRST to see if the right place for you,

750.

15/24 is an equivalent fraction of a/b. If a = 75, what is the value of b ? * 8 120 96 100

Answer»

Answer:

hi, I'm SURE that the right place. . only one I had the right place. the H.C.F, but the only THING is that I am searching

Step-by-step explanation:

quote from you, I have been a bit more than HAPPY with this GOOD of of of my favourite. the H.C.F, I will have to face with the FIRST to see if the right place for you,

Discussion

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Hope it's helpful to you

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ADDITIONAL INFORMATION :-

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Hey buddys help me again plz

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Plz give correct answer for it

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Please Answer the qns no. 10

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Express the following as a fraction.(i )120%

If sinA+sin^2=1, then the value of (cos^2a+cos^2a) plz solve this

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State which of the following statement are true.1) { } = 02) 0=03) 0={ }please say the answer

A piece of cloth 325 m long is cut and reduced to 65m what is percentage decrease in length

Guys it's urgent..what is 32+32÷16=please help me guys.

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Two dice are thrown simultaneously. What is the probability of getting a 3 or an even number?

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Prove that the four triangles formed by joining the midpoints of the sides of a parallelogram are congruent to each other.

Find the missing number. first row 1 2 1 ; second row 1 4 4; third row 1 6 ?; fourth row 1 9 6

If A,B and C are mutually independent events then show that AUB and C are independent events ..Faster reply please

Sum of ages of sejal and sonal is 30 years. sejal is older than sonal by 2 years. find the age of sejal

Simplify: (i)

Write the expand form and place value for this number 18950048 in international numbers with commasYou will answer this I make them as brainlest

Square root of the equation

If one angle of a parallelogram is 60° find the other angels

सू रेडफर्न (मैदान पर) टिम रॉबिन्सन (मैदान पर) स्टुअर्ट कमिंग (रेफरी)

3. If A and B are any two sets with some common elements and n(A)

If x + y + z = 7 and xy + yz + zx = 6, findx² + y² + z²

Reduce the following fractions to their lowest terms (1) 35/70(2) 4/26(3) 10/26

If x=m-2 and x/m - x+1/m =1 ,find m

4. Observe the histogram given below. The number of girls having height 145 cm and above isplease answer this fast please help me

15/24 is an equivalent fraction of a/b. If a = 75, what is the value of b ? * 8 120 96 100