Objective
To find and use trigonometric ratios
The Solve It involves ratios and right triangles. Ratios of the side lengths of a right triangle are called trigonometric ratios. Below are the definitions of three trigonometric ratios.
Name | Written | Definition |
---|---|---|
sine of
|
sin A |
|
cosine of
|
cos A |
|
tangent of
|
tan A |
|
Essential Understanding You can use the sine, cosine, and tangent ratios to find the measurements of sides and angles of right triangles.