What is the integral from 0 to pi of cos((5x)/2) ?

The integral from 0 to pi of cos((5x)/2) is 2/5

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integral from 0 to pi of cos((5x)/2)

\int_{0}^{π} cos (\frac{5 x}{2}) d x

\frac{2}{5}

Decimal Notation

0.4

Solution steps

\int_{0}^{π} cos (\frac{5 x}{2}) d x

Apply u-substitution

: \int_{0}^{\frac{5 π}{2}} cos (u) \frac{2}{5} d u

= \int_{0}^{\frac{5 π}{2}} cos (u) \frac{2}{5} d u

Take the constant out:

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

= \frac{2}{5} \cdot \int_{0}^{\frac{5 π}{2}} cos (u) d u

Use the common integral:

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

= \frac{2}{5} [sin (u)]_{0}^{\frac{5 π}{2}}

Compute the boundaries:

1

= \frac{2}{5} \cdot 1

Simplify

= \frac{2}{5}

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What is the integral from 0 to pi of cos((5x)/2) ?
The integral from 0 to pi of cos((5x)/2) is 2/5