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If `y = cos ^(2(x)/(2))` , state which of the following is the value of `(dy)/(dx)` ?

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If `y = cos ^(2(x)/(2))` , state which of the following is the value of `(dy)/(dx)` ?
A. cos x
B. `(1)/(2) cos x `
C. `-(1)/(2) sin x `
D. `- sin x `
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1 Answer

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Correct Answer - C
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