If $f(x)=6 \cos x+\sin ^{2} x$ , Find $f^{\prime}(x)$ And $f^{\prime \prime}(x)$
A)

question 90

Multiple Choice

If $f(x) =6 \cos x+\sin ^{2} x$ , find $f^{\prime}(x)$ and $f^{\prime \prime}(x)$ .

• A) \(f^{\prime \prime}(x)=-6 \cos (2 x)+2 \cos (x)\)
• B) \(f^{\prime}(x)=-6 \sin (x)+\sin (2 x)\)
• C) \(f^{\prime}(x)=-6 \sin (2 x)+\sin (x)\)
• D) \(f^{\prime \prime}(x)=-6 \cos (x)+2 \cos (2 x)\)
• E) \(f^{\prime \prime}(x)=-2 \cos (2 x)+6 \cos (x)\)