This trigonometry textbook takes the learner from a basic understanding of angles and triangles through the use of polar coordinates on the complex plane. Written by a mathematician-engineer, examples and problems here are used to...

Create trigonometric functions from circles. The first lesson of the module begins by finding coordinates along a circular path created by a Ferris Wheel. As the lessons progress, pupils graph trigonometric functions and relate them to...

[Free Registration/Login may be required to access all resource tools.] Define trigonometric relationships with algebraic ratios.

[Free Registration/Login may be required to access all resource tools.] Use right triangle ratios to solve for sides of triangles.

In Spanish. In this interactive activity you will learn about the six trigonometric ratios, discover relationships between the trigonometric ratios of complementary and supplementary angles and the relationship between the sides of a...

[Free Registration/Login may be required to access all resource tools.] Find all angles on the unit circle matching exact trig ratios. Resource includes examples, videos, and practice problems.

[Free Registration/Login may be required to access all resource tools.] Explain the inverse of trigonometric functions.