Question
If $y=\left(\sin \frac{x}{2}+\cos \frac{x}{2}\right)^{2}$, find $\frac{d y}{d x}$ at $x=\frac{\pi}{6}$
Step 1
This can be written as $y=\sin^{2}\frac{x}{2}+\cos^{2}\frac{x}{2}+2\sin\frac{x}{2}\cos\frac{x}{2}$. Show more…
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