Trigonometric Identities Teacher Resources

This tutorial applies all of the tools from triangle trigonometry to two specific cases: navigation and surveying. There are examples of each, as well as several exercises with solutions.

Video lesson showing how to adapt a rational function into a function which uses the product rule to find the derivative instead of using the quotient rule. Also includes the derivative of e to the x, the natural log of x, and the basic...

Given two sides in a right triangle, find one of the acute angles using trigonometry. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Students are presented with two graphs that show the populations of foxes and rabbits in a national park over a 24-month period. This is the third Foxes and Rabbits task. In this more realistic problem, students must find functions that...

In order to determine how effective solar panels would be at various times of the year, it is important to know the amount of daylight at a given location. Students are asked to find an appropriate function that serves as a mathematical...

An introduction to finding the area of a triangle using the sine function. Includes several pictures and examples.

[Free Registration/Login may be required to access all resource tools.] Calculate the secant, cosecant, and cotangent functions using the sides of a triangle.

[Free Registration/Login may be required to access all resource tools.] Define the sine and cosecant graphs using a unit circle.

Worked example evaluating sine and cosine using soh cah toa definition. [4:04]

Here is a site that clearly and thoroughly explains the unit circle and all six trigonometric functions of all quadrantal angles. There are example problems solved, problems for the student to attempt, and answers to the student...

Using the unit circle definition to think about the signs of the sine and the cosecant of a negative angle. [3:19]

Visualizing changes in amplitude and period for a cosine function

This site provides information on sine, cosine, and tangent. Lengths of the sides are discussed and many diagrams/tables are shown.

A java applet that will solve a right triangle when you provide information for angle D and its opposite side d.

A java applet that will solve a right triangle when you provide angle D and its adjacent side e.

A java applet that will solve a right triangle when you provide angle D and the length of the hypotenuse f.