If f(theta) = sin(tan^(-1)(sintheta/sqrt...

If `f(theta) = sin(tan^(-1)(sintheta/sqrt(cos2theta)))`, where `-pi/4 lt theta lt pi/4,` then the value of `d/(d(tantheta))\ f(theta)` is

A

1

B

2

C

3

D

4

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The correct Answer is:

A

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