Let f(x)= sin^(2)""x/2+cos^(2)""x/2 and ...

Let `f(x)= sin^(2)""x/2+cos^(2)""x/2` and `g(x)=sec^(2)x-tan^(2)x`. The two functions are equal over the set

A

`phi`

B

R

C

`R-{x|x=(2n+1) pi/2, n in Z}`

D

`R-{0}`

Verified by Experts

The correct Answer is:

C

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