MCQ
$\left(1-\cos ^4 \theta\right)=$
- A$\cos ^2 \theta\left(1-\cos ^2 \theta\right)$
- ✓$\sin ^2 \theta\left(1+\cos ^2 \theta\right)$
- C$\sin ^2 \theta\left(1-\sin ^2 \theta\right)$
- D$\sin ^2 \theta\left(1+\sin ^2 \theta\right)$
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