What is the integral from 0 to 2pi of sin^2(13x) ?

The integral from 0 to 2pi of sin^2(13x) is pi

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integral from 0 to 2pi of sin^2(13x)

\int_{0}^{2 π} sin^{2} (13 x) d x

π

Decimal Notation

3.14159 \dots

Solution steps

\int_{0}^{2 π} sin^{2} (13 x) d x

Rewrite using trig identities

= \int_{0}^{2 π} \frac{1}{2} (1 - cos (26 x)) d x

Take the constant out:

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

= \frac{1}{2} \cdot \int_{0}^{2 π} 1 - cos (26 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

= \frac{1}{2} (\int_{0}^{2 π} 1 d x - \int_{0}^{2 π} cos (26 x) d x)

\int_{0}^{2 π} 1 d x = 2 π

\int_{0}^{2 π} cos (26 x) d x = 0

= \frac{1}{2} (2 π - 0)

Simplify

\frac{1}{2} (2 π - 0) : π

= π

\int x cos^{2} (3 x) d x

\int (1 - t)^{2} d t

\frac{d}{d x} ((x^{3} - x) (2 x - x^{2}))

2 y + \frac{d y}{d x} = y^{2} + 1

h (x) = \frac{3}{x ^{2}} + 10 x^{3} - 2 sin (3 x)

What is the integral from 0 to 2pi of sin^2(13x) ?
The integral from 0 to 2pi of sin^2(13x) is pi