Trigonometric substitution
Revision as of 00:39, 8 July 2006 by Quantum leap (talk | contribs)
Trigonometric substitution is the technique of replacing unknown variables in equations with or
In calculus, it is used to evaluate integrals with expressions such as
and![]()
Contents
To evaluate an expression such as , we make use of the identity
. Set
and the radical will go away.
Making use of the identity , simply let
.
Since , let
.
Examples
This article is a stub. Help us out by expanding it.