Cofunction Identities

Cofunctions
Cofunctions in trigonometry are the reciprocals of the functions Sine, Cosine, and Tangent, being Cosecant, Secant, and Cotangent respectively.

cscϴ = hyp / opp

secϴ = hyp / adj

cotϴ = adj / opp

As inverses of the Pythagorean? functions, they can also be written as:

cscϴ = 1 / sinϴ

secϴ = 1 / cosϴ

cotϴ = 1 / tanϴ