### Basic trigonometric ratios : Example: Solving a 30-60-90 triangle

##### By: Sal Khan, Monterey Institute for Technology and Education

This worked example can be done without trigonometry, but we do show how knowledge of 30-60-90 triangles can be helpful when evaluating trig functions

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.