**See Also**

curves video, functions video, identities video, plane figures video, shapes video, trigonometric functions video, trigonometric identities video.

This clip gives the definitions of the trigonometric functions sine, cosine and tangent.

Sine cosine tangent video involves curves, functions, identities, plane figures, shapes, trigonometric functions, trigonometric identities. The video tutorial is recommended for 3rd Grade, 4th Grade, 5th Grade, 6th Grade, 7th Grade, 8th Grade, 9th Grade, 10th Grade, and/or 11th Grade Math students studying Algebra, Geometry, Trigonometry, Pre-Calculus, and/or Advanced Algebra.

In mathematics, the trigonometric functions are functions of an angle. They are important in the study of triangles and modeling periodic phenomena, among many other applications. Trigonometric functions are commonly defined as ratios of two sides of a right triangle containing the angle, and can equivalently be defined as the lengths of various line segments from a unit circle.