What is the integral from 0 to pi of cos(4x) ?

The integral from 0 to pi of cos(4x) is 0

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integral from 0 to pi of cos(4x)

\int_{0}^{π} cos (4 x) d x

0

Solution steps

\int_{0}^{π} cos (4 x) d x

Apply u-substitution

: \int_{0}^{4 π} cos (u) \frac{1}{4} d u

= \int_{0}^{4 π} cos (u) \frac{1}{4} d u

Take the constant out:

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

= \frac{1}{4} \cdot \int_{0}^{4 π} cos (u) d u

Use the common integral:

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

= \frac{1}{4} [sin (u)]_{0}^{4 π}

Compute the boundaries:

0

= \frac{1}{4} \cdot 0

Simplify

= 0

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\frac{d y}{d x} = 6 - y

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\frac{d}{d x} (\frac{( sec ( 9 x ) + 1 )}{( x ^{3} e ^{(- x)} )})

\int 3 cos (π - t) + (π - t)^{2} d t

What is the integral from 0 to pi of cos(4x) ?
The integral from 0 to pi of cos(4x) is 0