function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle
(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
what something is used for
the actions and activities assigned to or required or expected of a person or group
serve a purpose, role, or function
a set sequence of steps, part of larger computer program
a vaguely specified social event
