What is the integral of 20cos(x) ?

The integral of 20cos(x) is 20sin(x)+C

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integral of 20cos(x)

\int 20 cos (x) d x

20 sin (x) + C

Solution steps

\int 20 cos (x) d x

Take the constant out:

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

= 20 \cdot \int cos (x) d x

Use the common integral:

\int cos (x) d x = sin (x)

= 20 sin (x)

Add a constant to the solution

= 20 sin (x) + C

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