What is the integral from 0 to pi of 9sin^2(2x) ?

The integral from 0 to pi of 9sin^2(2x) is (9pi)/2

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integral from 0 to pi of 9sin^2(2x)

\int_{0}^{π} 9 sin^{2} (2 x) d x

\frac{9 π}{2}

Decimal Notation

14.13716 \dots

Solution steps

\int_{0}^{π} 9 sin^{2} (2 x) d x

Take the constant out:

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

= 9 \cdot \int_{0}^{π} sin^{2} (2 x) d x

Rewrite using trig identities

= 9 \cdot \int_{0}^{π} \frac{1}{2} (1 - cos (4 x)) d x

Take the constant out:

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

= 9 \cdot \frac{1}{2} \cdot \int_{0}^{π} 1 - cos (4 x) d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= 9 \cdot \frac{1}{2} (\int_{0}^{π} 1 d x - \int_{0}^{π} cos (4 x) d x)

\int_{0}^{π} 1 d x = π

\int_{0}^{π} cos (4 x) d x = 0

= 9 \cdot \frac{1}{2} (π - 0)

Simplify

9 \cdot \frac{1}{2} (π - 0) : \frac{9 π}{2}

= \frac{9 π}{2}

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\frac{\partial}{\partial x} (5 x^{5} y^{4} + 7 x^{6} y^{8})

\frac{d}{d x} (\frac{7 x}{8})

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\frac{d}{d x} (\frac{( - 2 x + 4 ) ^{7}}{( 3 x - 5 ) ^{5}})

What is the integral from 0 to pi of 9sin^2(2x) ?
The integral from 0 to pi of 9sin^2(2x) is (9pi)/2