CPM Homework Help : CALC Problem 9-64

Examine the integrals below. Consider the multiple tools available for integrating and use the best strategy. After evaluating each integral, write a short description of your method. Homework Help ✎

Step (a):

Use substitution: Let u = x² + 1

Hint (b):

cos(4θ) = cos(2(2θ)) = 2(cos²(2θ)) − 1

Step (b):

Substitute using the hint, then integrate using substitution.
Let u = cos(2θ).

Hint (c):

The integrand is a multiple of an inverse trigonometric function derivative.

Step (d):

Use substitution: Let u = x⁴