If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Unit circle definition of trig functions

This original Khan Academy video was translated into isiXhosa by Nezi Busakwe. The translation project was made possible by ClickMaths: www.clickmaths.org