# Trigonometric functions

# Trigonometric functions

Trigonometric functions are functions of an angle. They are used to relate the angles of a triangle to the lengths of the sides of a triangle.

If we have a right triangle with one angle θ

Then the following hold true

sineθ=ac

cosineθ=bc

tangentθ=ab

cosecantθ=ca

secantθ=cb

cotangentθ=ba