Find the derivatives of
$cos (5 x - 3)$

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Solution

Let $y = cos (5 x - 3)$

$\frac{d y}{d x} = - sin (5 x - 3) \frac{d}{d x} (5 x - 3)$

$\frac{d y}{d x} = - sin (5 x - 3) (5)$

$\frac{d y}{d x} = - 5 sin (5 x - 3)$

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