The value of $tan^{-1} (\frac{sin2 -1}{cos2})$ is equal to:-
The value of $tan^{-1} (\frac{sin2 -1}{cos2})$ is equal to:-
- A
$\frac{\pi}{2} - 1$
- B
$2 - \frac{\pi}{2}$
- C
$1- \frac{\pi}{4}$
- D
$ \frac{\pi}{4}-1$
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