Question

Solve:

$\sin 4\theta =1$. Where $\theta$ being acute.

Answer 1

Given,

$\sin 4\theta =1$

or, $\sin 4\theta =\sin \frac{\pi }{2}$

or, $4\theta =\frac{\pi }{2}$

or, $\theta =\frac{\pi }{8}$. [ Since $\theta$ being acute]