Find the Derivative of the Function $f ( s ) = 9 s \sin s + 5 \cos s .$

question 127

Multiple Choice

Find the derivative of the function. $f ( s ) = 9 s \sin s + 5 \cos s .$

• A) \(f ^ { t } ( s ) = 9 s \sin s - 4 \cos s\)
• B) \(f ^ { t } ( s ) = 9 s \cos s + 4 \sin s\)
• C) \(f ^ { t} ( s ) = 9 s \sin s - 9 \cos s\)
• D) \(f ^ { t} ( s ) = - 9 s \sin s + 4 \cos s\)
• E) \(f ^ { t } ( s ) = 9 s \cos s + 5 \sin s\)

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