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The value of the integral int0^1(dx)/(x^...

The value of the integral `int_0^1(dx)/(x^2+2xcosalpha+1)` is equal to `sinalpha` (b) `alphasinalpha` `alpha/(2sinalpha)` (d) `alpha/2sinalpha`

A

`sin alpha`

B

`alpha sin alpha`

C

`(alpha)/(2 sin alpha)`

D

`(alpha)/(2) sin alpha`

Text Solution

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-DEFINITE INTEGRALS-Exercise
  1. The value of the integral int(0)^(3alpha) cosec (x-alpha)cosec(x-2al...

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  2. The value of the integral int(0)^(pi)(sin 2k x)/(sin x)dx, where k in...

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  3. The value of the integral int0^1(dx)/(x^2+2xcosalpha+1) is equal to si...

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  4. The greater value of F(x)=int(1)^(x) |t|dt on the interval [-1//2,1//2...

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  5. The value of the integral int(0)^(pi//2) |sin x-cos x|dx, is

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  6. The value of the integral int(-pi//4)^(pi//4) sin^(-4)x dx, is

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  7. The value of the integral I=int(1)^(oo) (x^(2)-2)/(x^(3)sqrt(x^(2)-1))...

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  8. int(0)^(1) |sin 2pi x|dx id equal to

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  9. Evaluate: int(-pi)^pi(cosa x+s in b x)^2dx

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  10. The value of the definite integral int0^1(1+e^-x^2)dx (b) 2 1+e^...

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  11. If I=int(-pi)^(pi) (sin^(2))/(1+a^(x))dx, a gt 0, then I equals

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  12. If n is an odd natural number, then int(-pi//6)^(pi//6) (pi+4x^(n))/...

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  13. If I(1)=int(0)^(x) e^("zx ")e^(-z^(2))dz and I(2)=int(0)^(x) e^(-z^(2)...

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  14. int(0)^(1//2) |sin pi x|dx is equal to

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  15. If f(x)=int(0)^(x) log ((1-t)/(1+t)) dt, then discuss whether even or ...

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  16. int(1//3)^(3) (1)/(x)sin ((1)/(x)-x)dx is equal to

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  17. If F(x)=int(x^(2))^(x^(3)) log t dt (x gt 0), then F'(x) equals

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  18. If I=int(0)^(1) (dx)/(sqrt(1+x^(4)))dx then

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  19. If I=int(0)^(1) (dx)/(1+x^(4)), then

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  20. The value of int(-1)^(1)(x|x|)dx is equal to

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