What is the integral of sin^4(4x)cos^3(4x) ?

The integral of sin^4(4x)cos^3(4x) is 1/4 ((sin^5(4x))/5-(sin^7(4x))/7)+C

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integral of sin^4(4x)cos^3(4x)

\int sin^{4} (4 x) cos^{3} (4 x) d x

\frac{1}{4} (\frac{sin ^{5} ( 4 x )}{5} - \frac{sin ^{7} ( 4 x )}{7}) + C

Solution steps

\int sin^{4} (4 x) cos^{3} (4 x) d x

Apply u-substitution

: \int sin^{4} (u) cos^{3} (u) \frac{1}{4} d u

= \int sin^{4} (u) cos^{3} (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 sin^{4} (u) cos^{3} (u) d u

Rewrite using trig identities

= \frac{1}{4} \cdot \int (1 - sin^{2} (u)) cos (u) sin^{4} (u) d u

Apply u-substitution

: \int v^{4} (1 - v^{2}) d v

= \frac{1}{4} \cdot \int v^{4} (1 - v^{2}) d v

Expand

v^{4} (1 - v^{2}) : v^{4} - v^{6}

= \frac{1}{4} \cdot \int v^{4} - v^{6} d v

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}{4} (\int v^{4} d v - \int v^{6} d v)

\int v^{4} d v = \frac{v ^{5}}{5}

\int v^{6} d v = \frac{v ^{7}}{7}

= \frac{1}{4} (\frac{v ^{5}}{5} - \frac{v ^{7}}{7})

Substitute back

= \frac{1}{4} (\frac{sin ^{5} ( 4 x )}{5} - \frac{sin ^{7} ( 4 x )}{7})

Add a constant to the solution

= \frac{1}{4} (\frac{sin ^{5} ( 4 x )}{5} - \frac{sin ^{7} ( 4 x )}{7}) + C

\int 7 t e^{t} d t

\frac{( 2 + x ) d y}{d x} = 3 y

x \to a lim (x)

x \to 7 lim (8 x - 3)

\frac{\partial}{\partial u} (tan (u v^{3}))

What is the integral of sin^4(4x)cos^3(4x) ?
The integral of sin^4(4x)cos^3(4x) is 1/4 ((sin^5(4x))/5-(sin^7(4x))/7)+C