[Free Registration/Login may be required to access all resource tools.] Learn how to express angles of rotation.

[Free Registration/Login may be required to access all resource tools.] Find distance using right triangles and angles of elevation or depression.

[Free Registration/Login may be required to access all resource tools.] Find the unknown side of a triangle when two angles and a side are known.

[Free Registration/Login may be required to access all resource tools.] Find the unknown side of a triangle when two angles and the included side are known.

Fourteen problems present practice working with right angle trigonometry. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check...

Excellent site reviewing the realms of Trigonometry. Topics Include the trig functions, graphs, right triangles and much more.

Features a definition, examples, and a video lesson all related to angles. [0:35]

Resource provides trigonometry formulas for unit circle, reciprocal identities, ratio identities, Pythagorean identities, sum and difference formulas, and double-angle formulas.

[Free Registration/Login may be required to access all resource tools.] Use trigonometry to solve word problems.

[Free Registration/Login may be required to access all resource tools.] Definition of reference angle shown on the unit circle.

[Free Registration/Login may be required to access all resource tools.] Defining and identifying coterminal angles.

Angles are key to Trigonometry. Learn definitions of the parts of an angle, degrees, and radians, identify the standard position of an angle, convert between radians and degrees, and more.

Solving real life problem using trig ratios. Example: Finding the angle of elevation or the angle of depression. Finding the angle between two lines. Finding equation of a line that passes through two points.

[Free Registration/Login may be required to access all resource tools.] Use the Pythagorean Theorem to determine if triangles are acute, obtuse, or right triangles.

The Northeast Parallel Architectures Center, Syracuse University, provides a review and tutorial site on trigonometry. The information is in-depth and can be accessed by clicking on the various links in the outline.

Students investigate the relationships between angles and side lengths in right triangles with the help of materials found in the classroom and a mobile device.

In addition to understanding the concept of similar right triangles and how they apply to trigonometric ratios, students explore a clinometer app, and discover how it can be used to test the mathematics underpinning trigonometry.

This lesson gives a tutorial on the measure of an angle. Includes sample problems and solutions.

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)...

[Free Registration/Login may be required to access all resource tools.] Using identities to derive more half angle formulas.

[Free Registration/Login may be required to access all resource tools.] Derivation of double angle identities for sine, cosine, and tangent.

[Free Registration/Login may be required to access all resource tools.] Learn how to define trigonometric functions of angles with negative values.

[Free Registration/Login may be required to access all resource tools.] Determine the number of solutions for triangles where two sides and a non-included angle are known

Here is a site that clearly and thoroughly explains the trigonometric functions of any angle and the polar coordinate system. There are example problems solved, problems for the student to attempt, and answers to the student problems....