Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Solve the following equations for x:(i) tan−12x + tan−13x = nπ + 3π4(ii) tan−1(x + 1) + tan−1(x − 1) = tan−1831(iii) tan−1(x −1) + tan−1x tan−1(x + 1) = tan−13x(iv) tan−11-x1+x-12tan−1x = 0, where x > 0(v) cot−1x − cot−1(x + 2) = π12, x > 0(vi) tan−1(x + 2) + tan−1(x − 2) = tan−1879, x > 0(vii) tan-1x2+tan-1x3=π4, 0<x<6(viii) tan-1x-2x-4+tan-1x+2x+4=π4(ix) tan-12+x+tan-12-x=tan-123, where x<-3 or, x>3(x) tan-1x-2x-1+tan-1x+2x+1=π4

Answer» Solve the following equations for x:

(i) tan−12x + tan−13x = nπ + 3π4

(ii) tan−1(x + 1) + tan−1(x − 1) = tan−1831

(iii) tan−1(x −1) + tan−1x tan−1(x + 1) = tan−13x

(iv)
tan−11-x1+x-12tan−1x = 0, where x > 0

(v) cot
−1x − cot−1(x + 2) = π12, x > 0

(vi) tan
−1(x + 2) + tan−1(x − 2) = tan−1879, x > 0

(vii)
tan-1x2+tan-1x3=π4, 0<x<6

(viii) tan-1x-2x-4+tan-1x+2x+4=π4

(ix) tan-12+x+tan-12-x=tan-123, where x<-3 or, x>3

(x) tan-1x-2x-1+tan-1x+2x+1=π4
2.

The distance of the point A from the origin is

Answer»
The distance of the point A from the origin is
3.

Pick the graph(s) which corresponds to a function.

Answer»

Pick the graph(s) which corresponds to a function.



4.

If A=α22α and |A3| = 125, then α = ___________.

Answer» If A=α22α and |A3| = 125, then α = ___________.
5.

If A is the solution set of the equation logx2⋅log2x2=log4x2 and B is the solution set of the equation xlogx(3−x)2=25, then n(A∪B) is equal to

Answer»

If A is the solution set of the equation logx2log2x2=log4x2 and B is the solution set of the equation xlogx(3x)2=25, then n(AB) is equal to

6.

Find the rate of change of the area of a circle with respect to its radius r when(a) r=3 cm (b) r=4 cm

Answer» Find the rate of change of the area of a circle with respect to its radius r when

(a) r=3 cm (b) r=4 cm


7.

311 cos cos 211 + cot cot (211 + X) =

Answer» 311 cos cos 211 + cot cot (211 + X) =
8.

Zeros of p (x) = X2-2x-3

Answer» Zeros of p (x) = X2-2x-3
9.

If y = √x+√y+√x+√y+...∞ , then dydx is equal to

Answer»

If y = x+y+x+y+... , then dydx is equal to


10.

Which of the following options is equal to sin θ+1−cos θcos θ−1+sin θ?

Answer»

Which of the following options is equal to sin θ+1cos θcos θ1+sin θ?



11.

sin"(sin2兀16,

Answer» sin"(sin2兀16,
12.

The foci of the hyperbola9x2−16y2=144 are

Answer»

The foci of the hyperbola9x216y2=144 are


13.

15. The sum of n terms of two AP are in the ratio (5n+4):(9n+6). Find the ratio of their eighteenth term.

Answer» 15. The sum of n terms of two AP are in the ratio (5n+4):(9n+6). Find the ratio of their eighteenth term.
14.

If p(y)=2y3−6y2−5y+7 then find p(2).

Answer»

If p(y)=2y36y25y+7 then find p(2).

15.

f(x)=sgn(x), g(x)=x(x2−1) and ϕ(x)=(x2−1)sinx, then which of the following is/are periodic function

Answer» f(x)=sgn(x), g(x)=x(x21) and ϕ(x)=(x21)sinx, then which of the following is/are periodic function
16.

The value of 6∑k=1(sin2kπ7−cos2kπ7) is

Answer»

The value of 6k=1(sin2kπ7cos2kπ7) is

17.

List IList II(A)If∫(x2+cos2x1+x2)cosec2x dx=mcot−1x +n cosec xsecx,then(P)m=1(B)If∫√x+√x2+2 dx=m3(x+√x2+2)3/2(Q)n=−1 −n√x+√x2+2,then(C)If∫xtan−1x(1+x2)3/2dx=mx√1+x2(R)n=2 +ntan−1x√1+x2,then(D)If∫sin2xsin4x+cos4xdx=ncot−1(tan2x) +msin2x,then(S)m=−1(T)m=0(U)n=1Which of the following is the only CORRECT combination?

Answer» List IList II(A)If(x2+cos2x1+x2)cosec2x dx=mcot1x +n cosec xsecx,then(P)m=1(B)Ifx+x2+2 dx=m3(x+x2+2)3/2(Q)n=1 nx+x2+2,then(C)Ifxtan1x(1+x2)3/2dx=mx1+x2(R)n=2 +ntan1x1+x2,then(D)Ifsin2xsin4x+cos4xdx=ncot1(tan2x) +msin2x,then(S)m=1(T)m=0(U)n=1



Which of the following is the only CORRECT combination?
18.

The latus rectum of a parabola whose focal chord is PSQ such that SP=3 and SQ=2 is ?

Answer» The latus rectum of a parabola whose focal chord is PSQ such that SP=3 and SQ=2 is ?
19.

For three events A,B and C, P(Exactly one of A or B occurs)=P(Exactly one of B or C occurs)=P(Exactly one of C or A occurs)=14 and P(All the three events occur simultaneously)=116. Then the probability that at least one of the events occurs, is

Answer» For three events A,B and C, P(Exactly one of A or B occurs)=P(Exactly one of B or C occurs)=P(Exactly one of C or A occurs)=14 and P(All the three events occur simultaneously)=116. Then the probability that at least one of the events occurs, is
20.

How to represent \sqrt{3.6 } on a number lin

Answer» How to represent \sqrt{3.6 } on a number lin
21.

If xcosθ=ycosθ-2π3=zcosθ+2π3, then x + y + z = ____________.

Answer» If xcosθ=ycosθ-2π3=zcosθ+2π3, then x + y + z = ____________.
22.

[(A′∪B′)−A]′=___

Answer»

[(AB)A]=___



23.

The value of 30C030C10 - 30C130C11 + 30C230C12 - .......... + 30C2030C30 is

Answer»

The value of 30C030C10 - 30C130C11 + 30C230C12 - .......... + 30C2030C30 is


24.

The derivative of ln(secθ+tanθ) with respect to secθ at θ=π4 is

Answer» The derivative of ln(secθ+tanθ) with respect to secθ at θ=π4 is
25.

Angle of intersection of the curves 4x2+9y2=72 and x2−y2=5 at (3, 2) is equal to

Answer»

Angle of intersection of the curves 4x2+9y2=72 and x2y2=5 at (3, 2) is equal to

26.

Two numbers b and c are chosen at random (with replacement from the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9). The probability that x2+bx+c&gt;0 for all x∈R is

Answer»

Two numbers b and c are chosen at random (with replacement from the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9). The probability that x2+bx+c>0 for all xR is


27.

The general solution(s) of the equation cosθ+cos7θ=0 can be (n∈Z)

Answer»

The general solution(s) of the equation cosθ+cos7θ=0 can be (nZ)

28.

The equation of the curve which passes through the point (1, 1) and whose slope is given by 2yx, is

Answer»

The equation of the curve which passes through the point (1, 1) and whose slope is given by 2yx, is

29.

Let f be a real valued function defined as f(x)=x2+x21∫−1t⋅f(t) dt+x31∫−1f(t) dt. Then which of the following hold(s) good ?

Answer»

Let f be a real valued function defined as f(x)=x2+x211tf(t) dt+x311f(t) dt. Then which of the following hold(s) good ?

30.

In a triangle ABC,a3cos(B−C)+b3cos(C−A)+c3cos(A−B)=

Answer»

In a triangle ABC,a3cos(BC)+b3cos(CA)+c3cos(AB)=


31.

The eccentricity of the hyperbola whose length of conjugate axis is equal to half of the distance between its foci is e, then 3e2=

Answer» The eccentricity of the hyperbola whose length of conjugate axis is equal to half of the distance between its foci is e, then 3e2=
32.

If n∑r=0f(r)=A and ∣∣∣∣∣2rb2(2n−1)ac2(n+1)a3rx3n−1∣∣∣∣∣=f(r)where (a,b,c,x are rational numbers). Then the value of A is

Answer» If nr=0f(r)=A and

2rb2(2n1)ac2(n+1)a3rx3n1

=f(r)


where (a,b,c,x are rational numbers). Then the value of A is
33.

72.The general solution of sinx+3sin2x+sin3x=cosx+3cos2x+cos3x , 0

Answer» 72.The general solution of sinx+3sin2x+sin3x=cosx+3cos2x+cos3x , 0
34.

Prove that (sin7x+sin5x)+(sin9x+sin3x)(cos7x+cos5x)+(cos9x+cos3x)=tan6x

Answer» Prove that (sin7x+sin5x)+(sin9x+sin3x)(cos7x+cos5x)+(cos9x+cos3x)=tan6x
35.

63. What is Dulong and Petit's law it's uses and function

Answer» 63. What is Dulong and Petit's law it's uses and function
36.

Find the equation of the line which intersects the lines x+21=y−32=z+14 and x−12=y−23=z−34 and passes through the point (1, 1, 1).

Answer» Find the equation of the line which intersects the lines x+21=y32=z+14 and x12=y23=z34 and passes through the point (1, 1, 1).
37.

68.Prove that Tan50+sec50=tan70

Answer» 68.Prove that Tan50+sec50=tan70
38.

what is the significance of superposition principle

Answer» what is the significance of superposition principle
39.

If 20Cr=20Cr−10, then 18Cr is equal to

Answer»

If 20Cr=20Cr10, then 18Cr is equal to


40.

if f:N→N is defined by f(n)=n−(−1)n, then

Answer»

if f:NN is defined by f(n)=n(1)n, then



41.

Paragraph for below questionनीचे दिए गए प्रश्न के लिए अनुच्छेदIf f(x) is a function, then antiderivative of f(x) is represented as ∫f(x)dxGiven ∫ex(f(x)+f′(x))dx=exf(x)+c and ∫(f(x)+x⋅f′(x))dx=x⋅f(x)+cChoose the correct answer.यदि f(x) एक फलन है, तब f(x) के प्रतिअवकलज को ∫f(x)dx रूप में प्रदर्शित किया गया है।दिया है ∫ex(f(x)+f′(x))dx=exf(x)+c तथा ∫(f(x)+x⋅f′(x))dx=x⋅f(x)+cसही उत्तर का चयन कीजिए।Q. ∫ex⋅(sinx+tanx+1secx+1cos2x)dx is equal toप्रश्न - ∫ex⋅(sinx+tanx+1secx+1cos2x)dx का मान है

Answer»

Paragraph for below question

नीचे दिए गए प्रश्न के लिए अनुच्छेद



If f(x) is a function, then antiderivative of f(x) is represented as f(x)dx



Given ex(f(x)+f(x))dx=exf(x)+c and (f(x)+xf(x))dx=xf(x)+c



Choose the correct answer.



यदि f(x) एक फलन है, तब f(x) के प्रतिअवकलज को f(x)dx रूप में प्रदर्शित किया गया है।



दिया है ex(f(x)+f(x))dx=exf(x)+c तथा (f(x)+xf(x))dx=xf(x)+c



सही उत्तर का चयन कीजिए।



Q. ex(sinx+tanx+1secx+1cos2x)dx is equal to



प्रश्न - ex(sinx+tanx+1secx+1cos2x)dx का मान है

42.

13,(1+ex ) (2 +の

Answer» 13,(1+ex ) (2 +の
43.

If x+√x+2x−√x+2≥1, then

Answer»

If x+x+2xx+21, then

44.

If x=3, y=ω+2ω2 and z=ω2+2ω, then xyz is equal to

Answer»

If x=3, y=ω+2ω2 and z=ω2+2ω, then xyz is equal to

45.

If the function f defined as f(x)=1x−k−1e2x−1,x≠0, is continuous at x=0,then the ordered pair (k,f(0)) is equal to:

Answer»

If the function f defined as f(x)=1xk1e2x1,x0, is continuous at x=0,then the ordered pair (k,f(0)) is equal to:

46.

The coefficient of x9 in the expansion of (1+x)(1+x2)(1+x3)…….(1+x100) is .

Answer» The coefficient of x9 in the expansion of (1+x)(1+x2)(1+x3).(1+x100) is .
47.

The number of possible matrices of order 3 × 3 with each entry 2 or 0 is(a) 9(b) 27(c) 81(d) none of these

Answer» The number of possible matrices of order 3 × 3 with each entry 2 or 0 is



(a) 9

(b) 27

(c) 81

(d) none of these
48.

2. A tea party is arranged for 18 people along two sides of 9 chairs along each side.4 men wish to sit on a particular side & 3 on the other side .in how many ways they can be seated?

Answer» 2. A tea party is arranged for 18 people along two sides of 9 chairs along each side.4 men wish to sit on a particular side & 3 on the other side .in how many ways they can be seated?
49.

If for x≠0, y≠0, then D is

Answer»

If for x≠0, y≠0, then D is


50.

72. Simplify (3+3)(2+2)

Answer» 72. Simplify (3+3)(2+2)