Find the Derivative of the Function $f ( x ) = 9 \sin x - 8 \cos x$

question 42

Multiple Choice

Find the derivative of the function. $f ( x ) = 9 \sin x - 8 \cos x$

• A) \(f ^ { \prime } ( x ) = 9 \cos x + 8 \sin x\)
• B) \(f ^ { \prime } ( x ) = 8 \cos x - 9 \sin x\)
• C) \(f ^ { \prime } ( x ) = 9 \cos x - 8 \sin x\)
• D) \(f ^ { \prime } ( x ) = - 9 \cos x - 8 \sin x\)
• E) \(f ^ { \prime } ( x ) = 8 \cos x + 9 \sin x\)

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