11(vi)   Find the derivative of the following functions: 5 \sin x - 6 \cos x + 7

Answers (1)

Given,

f(x)=5 \sin x - 6 \cos x + 7

Now as we know the property 

\frac{d(y_1+y_2)}{dx}=\frac{dy_1}{dx}+\frac{dy_2}{dx}

So, applying the property,

f'(x)=5 \cos x - 6 (-\sin x ) + 0

f'(x)=5 \cos x + 6 (\sin x )

f'(x)=5 \cos x + 6 \sin x

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