Technique of integration

In calculus, a technique of integration is a method of evaluating a relatively difficult integral, usually by rewriting it in a simpler form.

Common techniques of integration include:

• Integration by substitution ("u-substitution" in two dimensions or coordinate transformation by means of a Jacobian matrix in multivariable calculus)
• Integration by parts
• Integration by partial fractions
• Integration by trigonometric substitution
• Approximation (by Taylor series or Riemann sum)

See also

• Table of integrals
• Leibniz integral rule