Express the following as a sum or difference of two trigonometric… - Vidyadip

Question

Express the following as a sum or difference of two trigonometric functions : $2 \sin 4 x \cos 2 x$

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Answer

$\begin{aligned}
& \text { i. } 2 \sin 4 x \cos 2 x=\sin (4 x+2 x)+\sin (4 x-2 x) \\
& =\sin 6 x+\sin 2 x
\end{aligned}$

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