MCQ
$\frac{d}{d x}\left(\sin \frac{x}{5}\right)=$
- A$\cos \frac{x}{5}$
- B$-\frac{1}{5} \cos \frac{x}{5}$
- ✓$\frac{1}{5} \cos \frac{x}{5}$
- D$-\frac{1}{5} \sin \frac{x}{5}$
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