\( \frac{d}{d x} \cos ^{-1} \sqrt{\cos x} \) is equal to:
P
W
(A) \...
\( \frac{d}{d x} \cos ^{-1} \sqrt{\cos x} \) is equal to:
P
W
(A) \( \frac{1}{2} \sqrt{1+\sec x} \)
(B) \( \sqrt{1+\sec x} \)
(C) \( -\frac{1}{2} \sqrt{1+\sec x} \)
(D) \( -\sqrt{1+\sec x} \)
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