What is the integral from 0 to 0.5 of sin(pix) ?

The integral from 0 to 0.5 of sin(pix) is 1/pi

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integral from 0 to 0.5 of sin(pix)

\int_{0}^{0.5} sin (π x) d x

\frac{1}{π}

Decimal Notation

0.31830 \dots

Solution steps

\int_{0}^{0.5} sin (π x) d x

Apply u-substitution

: \int_{0}^{1.57079 \dots} sin (u) \frac{1}{π} d u

= \int_{0}^{1.57079 \dots} sin (u) \frac{1}{π} d u

Take the constant out:

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

= \frac{1}{π} \cdot \int_{0}^{1.57079 \dots} sin (u) d u

Use the common integral:

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

= \frac{1}{π} [- cos (u)]_{0}^{1.57079 \dots}

Compute the boundaries:

1

= \frac{1}{π} \cdot 1

Simplify

= \frac{1}{π}

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What is the integral from 0 to 0.5 of sin(pix) ?
The integral from 0 to 0.5 of sin(pix) is 1/pi