Trigonometric ratios have many practical uses in the building industry, engineering, astronomy, and geography. This clip shows how to calculate sine, cosine, and tangent for given angles in right-angled triangles. Follow along as the hypotenuse, adjacent, and opposite sides are identified and the relationships between side lengths and ratios are explored. Ideal for introducing or reinforcing concepts.

Originally released by Video Education America (VEA), 2015. Streaming video file encoded with permission for digital streaming by Infobase on August 30, 2018.

Introducing Trigonometric Ratios (5:43); .