What is the integral of cos(1-5x) ?

The integral of cos(1-5x) is -1/5 sin(1-5x)+C

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integral of cos(1-5x)

\int cos (1 - 5 x) d x

- \frac{1}{5} sin (1 - 5 x) + C

Solution steps

\int cos (1 - 5 x) d x

Apply u-substitution

: \int - \frac{1}{5} cos (u) d u

= \int - \frac{1}{5} cos (u) d u

Take the constant out:

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

= - \frac{1}{5} \cdot \int cos (u) d u

Use the common integral:

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

= - \frac{1}{5} sin (u)

Substitute back

u = 1 - 5 x

= - \frac{1}{5} sin (1 - 5 x)

Add a constant to the solution

= - \frac{1}{5} sin (1 - 5 x) + C

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What is the integral of cos(1-5x) ?
The integral of cos(1-5x) is -1/5 sin(1-5x)+C