Evaluate : 2 x x d x - Vidyadip

Question

Evaluate : $\int \frac{\sin 2 x}{\cos x} d x$

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Answer

$\int \frac{\sin 2 x}{\cos x} d x$
$=\int \frac{2 \sin x \cos x}{\cos x} d x$
$=2 \int \sin x d x$
$=-2 \cos x+c$

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