Definition: ratio of the opposite to the adjacent side of a right-angled triangle
Similar words: circular function, trigonometric function
Definition: function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle
Synonyms: tangent
Definition: a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point
Similar words: straight line
Definition: a line traced by a point traveling in a constant direction; a line of zero curvature
Usage: the shortest distance between two points is a straight line