The general solution of $|\sin x| = \cos x$ is (when $n \in \mathbb{Z}$) given by:

Question

$n\pi + \frac{\pi}{4}$

$2n\pi + \frac{\pi}{4}$

$n\pi \pm \frac{\pi}{4}$

$2n\pi - \frac{\pi}{4}$

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