What is the integral from-1 to 1 of cos(2pix) ?

The integral from-1 to 1 of cos(2pix) is 0

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integral from-1 to 1 of cos(2pix)

\int_{- 1}^{1} cos (2 π x) d x

0

Solution steps

\int_{- 1}^{1} cos (2 π x) d x

Apply u-substitution

: \int_{- 2 π}^{2 π} cos (u) \frac{1}{2 π} d u

= \int_{- 2 π}^{2 π} cos (u) \frac{1}{2 π} d u

Take the constant out:

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

= \frac{1}{2 π} \cdot \int_{- 2 π}^{2 π} cos (u) d u

Use the common integral:

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

= \frac{1}{2 π} [sin (u)]_{- 2 π}^{2 π}

Compute the boundaries:

0

= \frac{1}{2 π} \cdot 0

Simplify

= 0

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What is the integral from-1 to 1 of cos(2pix) ?
The integral from-1 to 1 of cos(2pix) is 0