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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The Answer of 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) $f ^ { t } ( s ) = 9 s \cos s + 5 \sin s$

Find the Derivative of the Function f(s)=9ssin⁡s+5cos⁡s.f ( s ) = 9 s \sin s + 5 \cos s .f(s)=9ssins+5coss.

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