Clark University: Dave's Short Trig Course: Transformations of the Plane

This Clark University site gives a brief historical perspective into how trigonometry is used in astronomy, geography, engineering, physics, and mathematics.

This Clark University page is an excellent reference page for trig identities. It is a little difficult to read so take your time with the formulas. If you remember soh - cah - toa, the other formulas are right here.

This site from a professor at Clark University teaches you about complex numbers.

Explains what "tangent" is and its role in the right triangle. Slope of a line is investigated and tangent for special common angles is given. Angle of elevation and angle of depression are also covered here.

Contains general information regarding complex numbers and roots of unity.

This Clark University trigonometry tutorial site features questions and answers about what students can learn from trigonometry.

Contains detailed information on absolute values for complex numbers.

The Clark University site shows and explains the graphs of the six trigonometric functions. It explains how to find an arbitrary angle measurement using trig. Also, it explains that sine and cosine functions are complementary.

A number of different ways to approach complex numbers and operations with them.

This site defines transformation and lists several different examples of transformations. Be sure to follow the links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving...