Calculus Examples

Find the Integral cos(2x)^4
Step 1
Let . Then , so . Rewrite using and .
Tap for more steps...
Step 1.1
Let . Find .
Tap for more steps...
Step 1.1.1
Differentiate .
Step 1.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 1.1.3
Differentiate using the Power Rule which states that is where .
Step 1.1.4
Multiply by .
Step 1.2
Rewrite the problem using and .
Step 2
Combine and .
Step 3
Since is constant with respect to , move out of the integral.
Step 4
Simplify with factoring out.
Tap for more steps...
Step 4.1
Factor out of .
Step 4.2
Rewrite as exponentiation.
Step 5
Use the half-angle formula to rewrite as .
Step 6
Let . Then , so . Rewrite using and .
Tap for more steps...
Step 6.1
Let . Find .
Tap for more steps...
Step 6.1.1
Differentiate .
Step 6.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 6.1.3
Differentiate using the Power Rule which states that is where .
Step 6.1.4
Multiply by .
Step 6.2
Rewrite the problem using and .
Step 7
Since is constant with respect to , move out of the integral.
Step 8
Simplify terms.
Tap for more steps...
Step 8.1
Simplify.
Tap for more steps...
Step 8.1.1
Multiply by .
Step 8.1.2
Multiply by .
Step 8.2
Rewrite as a product.
Step 8.3
Expand .
Tap for more steps...
Step 8.3.1
Rewrite the exponentiation as a product.
Step 8.3.2
Apply the distributive property.
Step 8.3.3
Apply the distributive property.
Step 8.3.4
Apply the distributive property.
Step 8.3.5
Apply the distributive property.
Step 8.3.6
Apply the distributive property.
Step 8.3.7
Reorder and .
Step 8.3.8
Reorder and .
Step 8.3.9
Move .
Step 8.3.10
Reorder and .
Step 8.3.11
Reorder and .
Step 8.3.12
Move .
Step 8.3.13
Reorder and .
Step 8.3.14
Multiply by .
Step 8.3.15
Multiply by .
Step 8.3.16
Multiply by .
Step 8.3.17
Multiply by .
Step 8.3.18
Multiply by .
Step 8.3.19
Multiply by .
Step 8.3.20
Multiply by .
Step 8.3.21
Combine and .
Step 8.3.22
Multiply by .
Step 8.3.23
Combine and .
Step 8.3.24
Multiply by .
Step 8.3.25
Multiply by .
Step 8.3.26
Combine and .
Step 8.3.27
Multiply by .
Step 8.3.28
Multiply by .
Step 8.3.29
Combine and .
Step 8.3.30
Raise to the power of .
Step 8.3.31
Raise to the power of .
Step 8.3.32
Use the power rule to combine exponents.
Step 8.3.33
Add and .
Step 8.3.34
Add and .
Step 8.3.35
Combine and .
Step 8.3.36
Reorder and .
Step 8.3.37
Reorder and .
Step 8.4
Cancel the common factor of and .
Tap for more steps...
Step 8.4.1
Factor out of .
Step 8.4.2
Cancel the common factors.
Tap for more steps...
Step 8.4.2.1
Factor out of .
Step 8.4.2.2
Cancel the common factor.
Step 8.4.2.3
Rewrite the expression.
Step 9
Split the single integral into multiple integrals.
Step 10
Since is constant with respect to , move out of the integral.
Step 11
Use the half-angle formula to rewrite as .
Step 12
Since is constant with respect to , move out of the integral.
Step 13
Simplify.
Tap for more steps...
Step 13.1
Multiply by .
Step 13.2
Multiply by .
Step 14
Split the single integral into multiple integrals.
Step 15
Apply the constant rule.
Step 16
Let . Then , so . Rewrite using and .
Tap for more steps...
Step 16.1
Let . Find .
Tap for more steps...
Step 16.1.1
Differentiate .
Step 16.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 16.1.3
Differentiate using the Power Rule which states that is where .
Step 16.1.4
Multiply by .
Step 16.2
Rewrite the problem using and .
Step 17
Combine and .
Step 18
Since is constant with respect to , move out of the integral.
Step 19
The integral of with respect to is .
Step 20
Apply the constant rule.
Step 21
Combine and .
Step 22
Since is constant with respect to , move out of the integral.
Step 23
The integral of with respect to is .
Step 24
Simplify.
Tap for more steps...
Step 24.1
Simplify.
Step 24.2
Simplify.
Tap for more steps...
Step 24.2.1
To write as a fraction with a common denominator, multiply by .
Step 24.2.2
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
Tap for more steps...
Step 24.2.2.1
Multiply by .
Step 24.2.2.2
Multiply by .
Step 24.2.3
Combine the numerators over the common denominator.
Step 24.2.4
Move to the left of .
Step 24.2.5
Add and .
Step 25
Substitute back in for each integration substitution variable.
Tap for more steps...
Step 25.1
Replace all occurrences of with .
Step 25.2
Replace all occurrences of with .
Step 25.3
Replace all occurrences of with .
Step 25.4
Replace all occurrences of with .
Step 25.5
Replace all occurrences of with .
Step 26
Simplify.
Tap for more steps...
Step 26.1
Simplify each term.
Tap for more steps...
Step 26.1.1
Cancel the common factor of and .
Tap for more steps...
Step 26.1.1.1
Factor out of .
Step 26.1.1.2
Cancel the common factors.
Tap for more steps...
Step 26.1.1.2.1
Factor out of .
Step 26.1.1.2.2
Cancel the common factor.
Step 26.1.1.2.3
Rewrite the expression.
Step 26.1.2
Cancel the common factor of and .
Tap for more steps...
Step 26.1.2.1
Factor out of .
Step 26.1.2.2
Cancel the common factors.
Tap for more steps...
Step 26.1.2.2.1
Factor out of .
Step 26.1.2.2.2
Cancel the common factor.
Step 26.1.2.2.3
Rewrite the expression.
Step 26.1.3
Multiply .
Tap for more steps...
Step 26.1.3.1
Multiply by .
Step 26.1.3.2
Multiply by .
Step 26.1.4
Multiply by .
Step 26.2
Apply the distributive property.
Step 26.3
Simplify.
Tap for more steps...
Step 26.3.1
Multiply .
Tap for more steps...
Step 26.3.1.1
Multiply by .
Step 26.3.1.2
Multiply by .
Step 26.3.2
Multiply .
Tap for more steps...
Step 26.3.2.1
Multiply by .
Step 26.3.2.2
Multiply by .
Step 26.3.3
Multiply .
Tap for more steps...
Step 26.3.3.1
Multiply by .
Step 26.3.3.2
Multiply by .
Step 27
Reorder terms.