What is the integral of cot^2(x)cos(x) ?

The integral of cot^2(x)cos(x) is -csc(x)-sin(x)+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral of cot^2(x)cos(x)

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

- csc (x) - sin (x) + C

Solution steps

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

Rewrite using trig identities

= \int \frac{( 1 - sin ^{2} ( x ) ) cos ( x )}{sin ^{2} ( x )} d x

Apply u-substitution

= \int \frac{1 - u ^{2}}{u ^{2}} d u

Expand

\frac{1 - u ^{2}}{u ^{2}} : \frac{1}{u ^{2}} - 1

= \int \frac{1}{u ^{2}} - 1 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

= \int \frac{1}{u ^{2}} d u - \int 1 d u

\int \frac{1}{u ^{2}} d u = - \frac{1}{u}

\int 1 d u = u

= - \frac{1}{u} - u

Substitute back

u = sin (x)

= - \frac{1}{sin ( x )} - sin (x)

Use the basic trigonometric identity:

\frac{1}{sin ( x )} = csc (x)

= - csc (x) - sin (x)

Add a constant to the solution

= - csc (x) - sin (x) + C

What is the integral of cot^2(x)cos(x) ?
The integral of cot^2(x)cos(x) is -csc(x)-sin(x)+C