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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
Find the value of x x 3 2x x 1 = -31 0 1 |
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| 802. |
Example 18 chapter 7 |
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| 803. |
Find the conjugate of 1-4i/7+4i-7-4i? |
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Answer» My answer is correct or not 1+i/4 Tell me if it is correct then I will suggest solution 1+4i |
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| 804. |
What is the range ofthe functions f(x)=3x-2 |
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Answer» (-infinity,infinity) ( -- 2 , infinite) |
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| 805. |
For disjoint sets A and B ,n(A) = 3 , n(B) = 5 ,then n(A∩∩B) is |
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Answer» A intersection B = phy Disjoint sets means no element is common in them ø |
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| 806. |
exercise 3rd |
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| 807. |
Let A={1,2,3,4},B={3,5,6,7} and C={3,5,8}.Find the following... |
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Answer» Wht following ......? What to find ???? Find the following , what ? |
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| 808. |
2tan square x + sec square x = 2 |
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Answer» 2(1- sec square+ sec Square) 2(1)=2 hence proved exercise 3.1 |
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| 809. |
Sin x + sin 3x+ sin 5x = 0 |
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Answer» Thanks sinx + sin3x + sin5x = 0»(sinx + sin5x) + sin3x = 0Using the formula sinA + sinB = 2sin(A+B/2)cos(A-B/2) we get»2sin3x*cos2x + sin 3x = 0Taking sin3x common,»sin3x(2cos2x+1) = 0»sin3x = 0 or 2cos2x+1 = 0sin 3x = sin 0 or cos2x = -1/2» 3x = nπ + (-1)^n (0) or cos2x = cos 2π/3» x = nπ/3 or x = (2nπ ± 2π/3)/2» x = nπ/3 or x = nπ ± π/3 |
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| 810. |
2x+3y≥6, x-2y≤2 ,6x+4y≤24, -3x+2y≤3, x≥0 , y≥0 |
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| 811. |
2n-1 pn, 2n+1Pn-1=22:7 |
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| 812. |
Find the number of terms in the expansion of (a+b + c)^n |
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| 813. |
Cosbeta into cos 2alpha minus beta equal to |
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| 814. |
The smallest set A such thatA U ( 3,5 ) = (1,2,3,5,4 ) |
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Answer» 1,2 and 4 is fixed but3 and 5 may be 1,2 and 4 {1,2&4} 1,2&4 |
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| 815. |
The smallest set A such thatA U (3,5) =(1,2,3,5,4) |
| Answer» 1,2 and 4 is fixed but 3 and 5 may be | |
| 816. |
x+y≥1,x≤5,y≤4,2x+3y≤12,x≥0,y≥0 |
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| 817. |
A intersection ( A complement intersection B complement ) |
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Answer» Null setSuman is correct Because, if A = 1,2,3,4 and B = 3,4,5,6 and U = 1,2,3,4,5,6,7,8 ,Now A\' intersection B\' = 7,8 And A intersection ( A\' intersection B\') = phy No |
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| 818. |
Value of tan 40degrees |
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| 819. |
Value of tan40degree |
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| 820. |
A wheel make 360 revolution in one minute. Through how many radians does it turn on one second? |
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Answer» It\'s okay ?...... aur niche physics wale question ka answer +-4/√3 hoga.... 8/3 nii? as pi..... ??? Sorry I had taken it has pi......sorry Okay... and thanks....... 1revolition=2radian. Therefore it turn 12 redian in one second. .....I am good currently following unacademy jee . |
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| 821. |
write all possible relations from a= {1, 2} to b={ 0} |
| Answer» {(1,0),(2,0)} | |
| 822. |
Assume that P(A)=P(B), show that A=B |
| Answer» Let{x} belongs to P(A),Then x will belong to ABut {x} belongs to P(B) also since P(A)=P(B); this implies that x belongs to B.So A=B. | |
| 823. |
Show that A union B=B intersection A implies A=B |
| Answer» No A is not equal to B | |
| 824. |
Introduction of ex 3.4 |
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| 825. |
What is singleton set |
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Answer» A set contain only one element is known as singleton set. The set which has only one element like null set A set which contains only one element..... Introduction of ex 3.4 |
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| 826. |
Express each of complex number given in the exercises 1 to 10 in the form of a+ib (-2-1/3i)^3 |
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| 827. |
A intersection (A intersection B)=? |
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Answer» How can A come? A intersection B A |
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| 828. |
Class 8 ex.3.2 no.1 |
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Answer» Not the question no. Write the whole question Question? Class 8 ex.3.2 |
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| 829. |
if x y z are distinct real numbers then the value of (1/x-y)^2 +(1/y-z)^2+(1/z-x)^2 |
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Answer» Plz tell me the answer Hii Hello vansika |
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| 830. |
Let A,B and c be three sets.if a is an element of |
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| 831. |
{x:x+5/x-7*-5=4x-40/13-x} |
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| 832. |
write in roster form a={x:x belongs to z and 1/x is an integer} |
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| 833. |
write in roster form a={x:belongs to z and 1/x is an integer} |
| Answer» write in roster form a={x:xbelongs to z and 1/x is an integer} | |
| 834. |
Prove that - sin(x+y)/sin(x-y)=tan x + tan y/tan x-tan y |
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Answer» Itna aage kaha padh lete ho sab Step-by-step explanation:To prove,\xa0.L.H.S.Using trigonometric identity,\xa0andDividing numerator and denominator by\xa0,\xa0we get= R.H.S, proved.Hence,\xa0 |
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| 835. |
if a+ib/c+id=p+iq prove that p2+q2=a2+b2/c2+d2 |
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| 836. |
Principles of mathematical |
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| 837. |
From chapter5 |
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| 838. |
Mam Rdsharma examples |
| Answer» You can search it on google it shows vedantu and byju site where you can get your rd sharma examples of a particular chapter please type chapter name over there not number because in rd sharma chapter numbers are different from ncert book? got it | |
| 839. |
Sir, or mem , I can\'t study better at home , because at home time waste ,so when school open |
| Answer» 1 September may be or 17 September and yaha koi teacher nahi hai yaha sab student hai ???? | |
| 840. |
What is equal set |
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Answer» In the sets if all elements of one set is same as other set or equal to other set is known as equal set.I hope that u understood.If yes then contact with me6391348273 Two sets A and B can be equal only if each element of set A is also the element of the set B. Also if two sets are the subsets of each other, they are said to be equal. This is represented by:A\xa0=\xa0BA\xa0⊂\xa0B\xa0and\xa0B\xa0⊂\xa0A\xa0⟺\xa0A\xa0=\xa0BIf the condition discussed above is not met, then the sets are said to be unequal. This is represented byA\xa0≠\xa0B |
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| 841. |
what is set. ? ?? |
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Answer» Well defined collection of objects.If u understood then contact with me on whatsapp no. 6391348273 Set is 1 chapter of class 11 Well defined collection of objects which not change person to person Simply put, it\'s a collection of objectsExamplesN : the set of all natural numbersZ : the set of all integersQ : the set of all rational numbersR : the set of real numbersZ+ : the set of positive integersQ+ : the set of positive rational numbers, andR+ : the set of positive real numbersSet of even numbers: {..., -4, -2, 0, 2, 4, ...}Set of odd numbers: {..., -3, -1, 1, 3, ...}Set of prime numbers: {2, 3, 5, 7, 11, 13, 17, ...}Positive multiples of 3 that are less than 10: {3, 6, 9}\xa0 |
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| 842. |
HAPPY INDEPENDENCE DAY GUYS ?????????????????? |
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| 843. |
1/√8-Π7+1/√5-√6 |
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| 844. |
Show that the sum of (m+n)^th and (m-n)^th terms of an A.P. is equal to the twice of the m^th term |
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| 845. |
Show that cos4x=1-sin²x.cos²x |
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Answer» 8 is missing Yes LHS :cos4x=cos2(2x)=1−2sin22x=1−2(sin2x)2=1−2(2sinxcosx)2=1−8sin2xcos2x\xa0= RHS cos4x=1-sin²x.cos²x here 8 is missing I thought |
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| 846. |
What are allied angles |
| Answer» Trigonometric Ratios of Allied AnglesTwo angles are said to be allied when their sum or difference is either\xa0zero or a multiple of 90°. The angles — θ, 90° ± θ, 180° ± θ, 270° + θ,\xa0360° —θ etc., are angles allied to the angle θ, if θ is measured in degrees. | |
| 847. |
Find the domain and range of of square root x minus one into 3 - x |
| Answer» We have,f(x)=(x−1)(3−x)\u200bNow,Under square root the polynomial must be positive. The domain is obtained by solving:-(x−1)(3−x)≥0You can obtain the zeroes of the polynomial(x−1)(3−x)=0Ifx−1=0x=1If3−x=0⇒x=3So,x=1,3So the polynomial is solved in the external intervals.x>1,x>3So,x∈(1,+∞)Since the function\xa0f(x)\xa0is positive, due to result of square root,The range includes all positive real numbers\xa0x≥0Hence, this is the answer. | |
| 848. |
Find the value of tan pie/8 please |
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Answer» Let Ф = π/82Ф = π/4tan 2Ф = 1 = 2 tan Ф / [ 1 - tan² Ф ]1\xa0- tan² Ф = 2 tan Фtan² Ф + 2 tan Ф - 1 = 0tan Ф = 1/2 [ -2 +- √(4 +4) ] = -1 +- √2\xa0tan π/8 is > 0\xa0Therefore, tan π/8 = √2 - 1 Ok Tan180/8 = tan 22.5 = tan 45/2 With full explanation |
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| 849. |
1-i in polar form |
| Answer» In polar form,z= 1(Cos π/2 + i Sin π/2)Where r = 1 and ∅ = π/2(90°) | |
| 850. |
Write the dimensions of a/b in the relation f=a√x +bt² |
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