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int (cos 9x +cos 6x )/( 2 cos 5x-1)dx =A...

`int (cos 9x +cos 6x )/( 2 cos 5x-1)dx =A sin 4x +B sin+C,` then `A+B` is equal to:
(Where C is constant of integration)

A

`1/2`

B

`3/4`

C

`2`

D

`5/4`

Text Solution

Verified by Experts

The correct Answer is:
D
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VK JAISWAL-INDEFINITE AND DEFINITE INTEGRATION-EXERCISE (SUBJECTIVE TYPE PROBLEMS)
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  9. Let int ( 1) ^(sqrt5)(x ^(2x ^(2)+1) +ln "("x ^(2x ^(2x ^(2+1)))")")dx...

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  13. int( x^3)/(x^2-3)dx

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  14. If a continuous function f on [0,a] satisfies f(x)f(a-x)=1,agt0, then ...

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  15. If {x} denotes the fractional part of x, then I = int (0) ^(100) (sqrt...

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  16. int( x^3)/(x^2-2)dx

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  17. IF M be the maximum valur of 72 int (0) ^(y) sqrt(x ^(4) +(y-y^(2))^(2...

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  18. Find the number points where f (theta) = int (-1)^(1) (sin theta dx )/...

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  19. underset(nrarroo)lim[(1)/(sqrtn)+(1)/(sqrt(2n))+(1)/(sqrt(3n))+...+(1)...

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  20. The maximum value of int (-pi//2) ^(2pi//2) sin x. f (x) dx, subject t...

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  21. Given a funtion g, continous everywhere such that g (1)=5 and int (0)^...

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