What is the integral of 24sec^4(x) ?

The integral of 24sec^4(x) is 24(tan(x)+(tan^3(x))/3)+C

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integral of 24sec^4(x)

\int 24 sec^{4} (x) d x

24 (tan (x) + \frac{tan ^{3} ( x )}{3}) + C

Solution steps

\int 24 sec^{4} (x) d x

Take the constant out:

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

= 24 \cdot \int sec^{4} (x) d x

Rewrite using trig identities

= 24 \cdot \int (1 + tan^{2} (x)) sec^{2} (x) d x

Apply u-substitution

: \int 1 + u^{2} d u

= 24 \cdot \int 1 + u^{2} 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

= 24 (\int 1 d u + \int u^{2} d u)

\int 1 d u = u

\int u^{2} d u = \frac{u ^{3}}{3}

= 24 (u + \frac{u ^{3}}{3})

Substitute back

u = tan (x)

= 24 (tan (x) + \frac{tan ^{3} ( x )}{3})

Add a constant to the solution

= 24 (tan (x) + \frac{tan ^{3} ( x )}{3}) + C

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What is the integral of 24sec^4(x) ?
The integral of 24sec^4(x) is 24(tan(x)+(tan^3(x))/3)+C