# Trigonometric Substitution

## Substituting x for Trigonometric Functions Under different Situations

Integrals involving  in this situation, we can replace x with Therefore: =     (At this point, we recognize that ) = Integrals involving in this situation, we will replace x with Therefore: =     (At this point, we recognize that ) = integrals involving in this situation, we will replace x with =    (At this point we recognize that ) =