Question
यदि $\sin 2x + \sin 4x = 2\sin 3x,$ तब $x = $
$\therefore $ $\sin 3x = 0$, $\cos x = 1$
$\Rightarrow 3x = n\pi $ या $x = \frac{{n\pi }}{3}$ और $x = 2n\pi $
द्वितीय मान $x = 2n\pi $, दिये गये मान $x = \frac{{n\pi }}{3}$ में समाहित है।
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