What is the integral of 5sin(2x)e^x ?

The integral of 5sin(2x)e^x is -2e^xcos(2x)+e^xsin(2x)+C

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integral of 5sin(2x)e^x

\int 5 sin (2 x) e^{x} d x

- 2 e^{x} cos (2 x) + e^{x} sin (2 x) + C

Solution steps

\int 5 sin (2 x) e^{x} d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 5 \cdot \int sin (2 x) e^{x} d x

Apply Integration By Parts

= 5 (- \frac{1}{2} e^{x} cos (2 x) - \int - \frac{1}{2} e^{x} cos (2 x) d x)

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 5 (- \frac{1}{2} e^{x} cos (2 x) - (- \frac{1}{2} \cdot \int e^{x} cos (2 x) d x))

Apply Integration By Parts

= 5 (- \frac{1}{2} e^{x} cos (2 x) - (- \frac{1}{2} (e^{x} \frac{1}{2} sin (2 x) - \int e^{x} \frac{1}{2} sin (2 x) d x)))

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 5 (- \frac{1}{2} e^{x} cos (2 x) - (- \frac{1}{2} (e^{x} \frac{1}{2} sin (2 x) - \frac{1}{2} \cdot \int e^{x} sin (2 x) d x)))

Therefore

5 \cdot \int e^{x} sin (2 x) d x = 5 (- \frac{1}{2} e^{x} cos (2 x) - (- \frac{1}{2} (e^{x} \frac{1}{2} sin (2 x) - \frac{1}{2} \cdot \int e^{x} sin (2 x) d x)))

Isolate

\int e^{x} sin (2 x) d x

= 5 (- \frac{2 e ^{x} cos ( 2 x )}{5} + \frac{e ^{x} sin ( 2 x )}{5})

Simplify

5 (- \frac{2 e ^{x} cos ( 2 x )}{5} + \frac{e ^{x} sin ( 2 x )}{5}) : - 2 e^{x} cos (2 x) + e^{x} sin (2 x)

= - 2 e^{x} cos (2 x) + e^{x} sin (2 x)

Add a constant to the solution

= - 2 e^{x} cos (2 x) + e^{x} sin (2 x) + C

What is the integral of 5sin(2x)e^x ?
The integral of 5sin(2x)e^x is -2e^xcos(2x)+e^xsin(2x)+C