## Calculus: Early Transcendentals (2nd Edition)

The six trigonometric functions in terms of a right triangle are as follows: sinΘ = $opposite/hypotenuse$ cosΘ = $adjacent/hypotenuse$ tanΘ = $opposite/adjacent$ cscΘ = $hypotenuse/opposite$ secΘ = $hypotenuse/adjacent$ cotΘ = $adjacent/opposite$