What is the integral of (42)/(1-cos(6x)) ?

The integral of (42)/(1-cos(6x)) is -7cot(3x)+C

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integral of (42)/(1-cos(6x))

\int \frac{42}{1 - cos ( 6 x )} d x

- 7 cot (3 x) + C

Solution steps

\int \frac{42}{1 - cos ( 6 x )} d x

Take the constant out:

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

= 42 \cdot \int \frac{1}{1 - cos ( 6 x )} d x

Apply u-substitution

: \int \frac{1}{6 ( 1 - cos ( u ) )} d u

= 42 \cdot \int \frac{1}{6 ( 1 - cos ( u ) )} d u

Take the constant out:

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

= 42 \cdot \frac{1}{6} \cdot \int \frac{1}{1 - cos ( u )} d u

Apply u-substitution

: \int \frac{1}{v ^{2}} d v

= 42 \cdot \frac{1}{6} \cdot \int \frac{1}{v ^{2}} d v

Apply the Power Rule

: - \frac{1}{v}

= 42 \cdot \frac{1}{6} (- \frac{1}{v})

Substitute back

= 42 \cdot \frac{1}{6} (- \frac{1}{tan ( \frac{6 x}{2} )})

Simplify

42 \cdot \frac{1}{6} (- \frac{1}{tan ( \frac{6 x}{2} )}) : - 7 cot (3 x)

= - 7 cot (3 x)

Add a constant to the solution

= - 7 cot (3 x) + C

\int (2 x y^{3}) d x

x \to 0 lim (\frac{x}{x ^{2} - x})

y^{^{'}} = e^{3 x + y}

\frac{d}{d x} (\frac{3 x ^{\frac{1}{2}}}{2})

\int x (e^{- 5 x}) d x

What is the integral of (42)/(1-cos(6x)) ?
The integral of (42)/(1-cos(6x)) is -7cot(3x)+C