In this activity students use the CAS tool to explore sin, cos, and tan functions. They expand the functions and find the domain. They also prove the conjectures.

BBC provides a tutorial that explains how radians are related to degrees and demonstrates how to solve trig equations in radian units. Examples and a practice test are available.

[Free Registration/Login may be required to access all resource tools.] An alternate formula for the area of a triangle.

This site provides several real-world application problems that can be solved using sinusoidal functions. Students are asked to sketch, model and solve the problems.

Explains the horizontal forms of trigonometric graphs by showing how they relate to the circular graphs.

[Free Registration/Login may be required to access all resource tools.] Looks at triangle problems where you are given the area and must use trigonometry to find unknown sides or angles.

Graphs of the cosecant function, both 2-dimensional and 3-dimensional. This site from Math World tells the relation between cosecant and sine. If you are not familiar with the sine function there is a link for a better understanding....

[Free Registration/Login Required] Linear, sine, and quadratic equations are displaying a number of graphs and tables. Challenging and might even challenge the teacher. Go for it.

An image of "Sine Cerere et Baccho friget Venus", created by Cornelis Van Poelenburgh, c. 1630 (Oil on wood, 33 x 50 cm).

Three trig tables are provided for student and teacher reference. The first table lists the sine, cosine, tangent, secant, cosecant, and cotangent values of all whole-number angles from 0 to 90. The radian equivalent (to four decimals)...

These two navigation problems employ the use of the law of sines or cosines and basic trigonometry. Each problems includes links to a sketch of the problem for visual help, and to a solution.

This site is a personal site from David Eisenberg and it contains brief but great review information for trigonometry. This particular site focuses on sine and cosine inlcuding a small circle graph. Clicking on the index link provides...

In Spanish. Play submarine by using trigonometry, learn the law of sines and cosine, build an instrument to measure angles and distance and find out who was the father of Trigonometry.

Explore sine, cosine, and tangents compared to the selected angle.

Find a quick, concise explanation of the trigonometric ratios: sine, cosine and tangent. Examples are given and clearly explained.

Each calculation option has sub-bullets that list the sequence of methods used in this calculator to solve for unknown angle and side values including Sum of Angles in a Triangle, Law of Sines, and Law of Cosines.

This online trigonometry calculator will calculate the sine, cosine, tangent, cotangent, secant and cosecant of angle values entered in degrees or radians. The trigonometric functions are also known as the circular functions.

This online trigonometry calculator will calculate the sine, cosine, tangent, cotangent, secant and cosecant of values. The trigonometric functions are also known as the circular functions.

Just about everything you need to know about trigonometry can be found here. Interactive examples and demonstrations help to enhance the lessons. Although not required, the tutorial uses Live Math and Scientific Notebook.

Introductory lesson to trigonometric functions. Includes definitions, properties, graphs, and a wide variety of examples and practice exercises.

This tutorial introduces the sum and differnce formulas for tangent, and gives several examples of problems to be solved as well as proving other identities. Assumes knowledge of the sum and difference formulas for sine and cosine.

A learning module exploring travelling waves. Learn about reflections, wave travelling equations, waves on a string, and travelling sine waves with animations and videos.

Here is a site that clearly and thoroughly explains how to find the derivative of each of the six trigonometric functions. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point...

A wonderful Zola site in French that includes biographical information, summaries of his works, a bibliography, and a photo gallery with caricatures.