Sine, Cosine, and Tangent on the Unit Circle
11th Grade · Math · 45 min
Lesson Preview
Learning Objective
I can determine the sine, cosine, and tangent of angles using the unit circle.
- 1
The unit circle is a circle with a radius of one, centered at the origin on the coordinate plane.
- 2
Every point on the unit circle has an X coordinate equal to cosine theta and a Y coordinate equal to sine theta.
- 3
The numerical sequence to remember for sine and cosine values in the first quadrant is root zero over two, root one over two, root two over two, root three over two, and root four over two.
