Find the Derivative of the Function and Simplify Your Answer $y = \cos ^ { 2 } x$

question 7

Multiple Choice

Find the derivative of the function and simplify your answer by using the trigonometric identities $y = \cos ^ { 2 } x$

• A) \(- 2 \cos ^ { 2 } x \sin ^ { 2 } x = 2 \sin 2 x\)
• B) \(2 \cos x \sin x = \sin 2 x\)
• C) \(- 2 \cos x \sin x = - \sin 2 x\)
• D) \(2 \cos ^ { 2 } x \sin x = 2 \sin x\)
• E) \(2 \cos ^ { 2 } x \sin ^ { 2 } x = 2 \sin 2 x\)

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