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Let f(theta)=sin(tan^(-1)((sintheta)/(s...

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

A

1

B

2

C

3

D

4

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