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

The derivative of e^x(cos(x)) is e^xcos(x)-e^xsin(x)

What is the first derivative of e^x(cos(x)) ?

The first derivative of e^x(cos(x)) is e^xcos(x)-e^xsin(x)

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\frac{d}{d x} (e^{x} (cos (x)))

e^{x} cos (x) - e^{x} sin (x)

Solution steps

\frac{d}{d x} (e^{x} (cos (x)))

Apply the Product Rule:

(f \cdot g)^{'} = f^{'} \cdot g + f \cdot g^{'}

f = e^{x}, g = cos (x)

= \frac{d}{d x} (e^{x}) cos (x) + \frac{d}{d x} (cos (x)) e^{x}

\frac{d}{d x} (e^{x}) = e^{x}

\frac{d}{d x} (cos (x)) = - sin (x)

= e^{x} cos (x) + (- sin (x)) e^{x}

Simplify

= e^{x} cos (x) - e^{x} sin (x)

What is the derivative of e^x(cos(x)) ?
The derivative of e^x(cos(x)) is e^xcos(x)-e^xsin(x)
What is the first derivative of e^x(cos(x)) ?
The first derivative of e^x(cos(x)) is e^xcos(x)-e^xsin(x)