Page 9 - Ebook Trigonometri_Krisna Hasugian_MESP 2019
P. 9
Unit Circle
The Unit Circle is a circle that is centered at the origin and always has a radius of
1. The unit circle will be helpful to us later when we define the trigonometric
ratios. You may remember from Algebra 2 that the equation of the Unit Circle is
² + ² = 1.
Need more help? Click below for a Khan Academy video
Khan Academy video 1
8
