MCQ
$\frac{d}{d \theta}\left(\cos ^3 \theta\right)=$
- A$-3 \sin ^3 \theta$
- B$3 \sin ^2 \theta \cos \theta$
- ✓$-3 \cos ^2 \theta \sin \theta$
- D$3 \cos ^2 \theta \sin \theta$
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