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.)
Example of Trigonometric Table:
Example of using a Trigonometric Function: