If \( \pi2 \theta\frac{3 \pi}{2} \), then \( \sqrt{2+\sqrt{2+2 \cos 4 \theta}} \) equals to
\( P...
If \( \pi2 \theta\frac{3 \pi}{2} \), then \( \sqrt{2+\sqrt{2+2 \cos 4 \theta}} \) equals to
\( P \)
(A) \( -2 \cos \theta \)
(B) \( -2 \sin \theta \)
W.
(C) \( 2 \cos \theta \)
(D) \( 2 \sin \theta \)
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