Khan Academy Static

Another super useful technique for computing integrals involves replacing variables with trigonometric functions. This can make things seem a little more complicated at first, but with the help of trigonometric identities, this technique makes certain integrals solvable.

5283_Long_trig_sub_problem.html

5276_Introduction_to_trigonometric_substitution.html

5279_Trig_and_u_substitution_together_part_1_.html

5277_Substitution_with_x_sin_theta_.html

5281_Trig_substitution_with_tangent.html

5278_More_trig_sub_practice.html

5280_Trig_and_u_substitution_together_part_2_.html

5282_More_trig_substitution_with_tangent.html