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derivative of e^sin(x)

What is the derivative of e^sin(x)?

What is the derivative of e^{\sin(x)}?

Solution. Let h(x) = e^{\sin(x)}, f(u) = e^u and g(x) = \sin(x). We will use the chain rule:
\begin{align*}
h'(x) = f'(g(x))g'(x).
\end{align*}
We have that \frac{d}{dx} e^x = e^x and \frac{d}{dx} \sin(x) = \cos(x). So we have that
\begin{align*}
f'(u) = e^u \quad \text{and} \quad g'(x) = \cos(x).
\end{align*}
Therefore, we get
\begin{align*}
h'(x) &= f'(g(x))g'(x) \\
&= e^{\sin(x)}\cos(x) \\
&= \cos(x)e^{\sin(x)}
\end{align*}
So the derivative of e^{\sin(x)} is \cos(x)e^{\sin(x)}.

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