Question
Find $y^{\prime \prime}$ for the following functions.$$y=\cos \theta \sin \theta$$
Step 1
We apply the product rule which states that $(fg)' = f'g + fg'$. Here, $f = \cos \theta$ and $g = \sin \theta$. The derivative of $f$ is $f' = -\sin \theta$ and the derivative of $g$ is $g' = \cos \theta$. Show more…
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