What is the integral of sin^3(5x)cot(5x) ?

The integral of sin^3(5x)cot(5x) is 1/15 sin^3(5x)+C

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integral of sin^3(5x)cot(5x)

\int sin^{3} (5 x) cot (5 x) d x

\frac{1}{15} sin^{3} (5 x) + C

Solution steps

\int sin^{3} (5 x) cot (5 x) d x

Rewrite using trig identities

= \int sin^{2} (5 x) cos (5 x) d x

Apply u-substitution

: \int sin^{2} (u) cos (u) \frac{1}{5} d u

= \int sin^{2} (u) cos (u) \frac{1}{5} d u

Take the constant out:

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

= \frac{1}{5} \cdot \int sin^{2} (u) cos (u) d u

Apply u-substitution

: \int v^{2} d v

= \frac{1}{5} \cdot \int v^{2} d v

Apply the Power Rule

: \frac{v ^{3}}{3}

= \frac{1}{5} \cdot \frac{v ^{3}}{3}

Substitute back

= \frac{1}{5} \cdot \frac{sin ^{3} ( 5 x )}{3}

Simplify

\frac{1}{5} \cdot \frac{sin ^{3} ( 5 x )}{3} : \frac{1}{15} sin^{3} (5 x)

= \frac{1}{15} sin^{3} (5 x)

Add a constant to the solution

= \frac{1}{15} sin^{3} (5 x) + C

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What is the integral of sin^3(5x)cot(5x) ?
The integral of sin^3(5x)cot(5x) is 1/15 sin^3(5x)+C