Every time you use a trigonometric function, the triangle must be a(n)...

The side on the opposite side of a given angle is called "opposite."

The side of a triangle that is the only side touching the given angle (besides the hypotenuse)is the "adjacent."

The longest side of a given triangle is the "hypotenuse." (It is never called adjacent.)

Tangent

Sine

Cosine

Trigonometric Tables

Example of Trigonometric Table:

Example of using a Trigonometric Function: