MCQ
$\frac{d}{d x}\left(\sin \frac{x}{2}\right)=$
- A$\cos \frac{x}{2}$
- B$2 \cos \frac{x}{2}$
- ✓$\frac{1}{2} \cos \frac{x}{2}$
- D$-2 \cos \frac{x}{2}$
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