Friday, February 1, 2008
The Cofunction Identities:
cos(theta) == sin(Pi/2 - theta) tan(theta) == cot(Pi/2 - theta) sec(theta) == csc(Pi/2 - theta)
sin(theta) == cos(Pi/2 - theta) cot(theta) == tan(Pi/2 - theta) csc(theta) == sec(Pi/2 - theta)
Trig - Identities - Cofunction Identities
