What is the integral of 11tan^4(x)sec^6(x) ?

The integral of 11tan^4(x)sec^6(x) is 11((tan^5(x))/5+(2tan^7(x))/7+(tan^9(x))/9)+C

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integral of 11tan^4(x)sec^6(x)

\int 11 tan^{4} (x) sec^{6} (x) d x

11 (\frac{tan ^{5} ( x )}{5} + \frac{2 tan ^{7} ( x )}{7} + \frac{tan ^{9} ( x )}{9}) + C

Solution steps

\int 11 tan^{4} (x) sec^{6} (x) d x

Take the constant out:

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

= 11 \cdot \int tan^{4} (x) sec^{6} (x) d x

Rewrite using trig identities

= 11 \cdot \int sec^{2} (x) (1 + tan^{2} (x))^{2} tan^{4} (x) d x

Apply u-substitution

: \int u^{4} (1 + u^{2})^{2} d u

= 11 \cdot \int u^{4} (1 + u^{2})^{2} d u

Expand

u^{4} (1 + u^{2})^{2} : u^{4} + 2 u^{6} + u^{8}

= 11 \cdot \int u^{4} + 2 u^{6} + u^{8} d u

Apply the Sum Rule:

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

= 11 (\int u^{4} d u + \int 2 u^{6} d u + \int u^{8} d u)

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

\int 2 u^{6} d u = \frac{2 u ^{7}}{7}

\int u^{8} d u = \frac{u ^{9}}{9}

= 11 (\frac{u ^{5}}{5} + \frac{2 u ^{7}}{7} + \frac{u ^{9}}{9})

Substitute back

u = tan (x)

= 11 (\frac{tan ^{5} ( x )}{5} + \frac{2 tan ^{7} ( x )}{7} + \frac{tan ^{9} ( x )}{9})

Add a constant to the solution

= 11 (\frac{tan ^{5} ( x )}{5} + \frac{2 tan ^{7} ( x )}{7} + \frac{tan ^{9} ( x )}{9}) + C

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What is the integral of 11tan^4(x)sec^6(x) ?
The integral of 11tan^4(x)sec^6(x) is 11((tan^5(x))/5+(2tan^7(x))/7+(tan^9(x))/9)+C