Copy of Sin Cos and Tan animated from the unit circle

Author:Tomasz Lechowski, Tim Elton

See how the functions sin, cos, and tan are defined from the unit circle, extending the definitions beyond the the 0 to 90 degrees that fit nicely inside a right-angled triangle.

New Resources

Pythagorean Theorem: Quick Illustrator
Linear Equation Graphs: Thin Slice
Function Art 3D - Flower
Squares Question
Pythagorean Theorem: Extension Exercises

Discover Resources

Congruence Transformations
Graphing Linear Equations in Two Variables
Step III 2011 Q10 - Written Solution
Geogebra Circumcenter

Discover Topics

Cosine
Median Value
General Quadrilateral
Numbers
Integers