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Basic Trigonometry

Related Topics: Trigonometry Worksheets, Trigonometry Games

Need some help in Trigonometry?

What is Trigonometry? The word trigonometry means 'triangle measurement'.

Trigonometry is an important tool for evaluating measurements of height and distance. It plays an important role in surveying, navigation, engineering, astronomy and many other branches of physical science.

Basic Trigonometry involves the ratios of the sides of right triangles. The three ratios are called tangent, sine and cosine. It can then be extended to other ratios and Trigonometry in the Cartesian Plane.

These lessons on trigonometry will include the following topics: Basic Trigonometry, Applications of Trigonometry, Trigonometry in the Cartesian Plane, Graphs of Trigonometric Functions, and Trigonometric Identities.

Basic Trigonometry

Applications of Trigonometry

Trigonometry ProblemsWord Problems
Sine ProblemsMissing angles, missing sides, word problems
Cosine ProblemsMissing angles, missing sides, word problems
Tangent ProblemsMissing angles, missing sides, word problems

Trigonometry in the Cartesian Plane



Graphs of Trigonometric Functions

Trigonometric Identities


Trigonometry Lessons in Videos

A series of free High School Trigonometry Video Lessons.

Pythagorean Theorem

Basic Trigonometry

Trigonometric Functions


Advanced Trigonometry


You can use the Mathway widget below to practice Trigonometry or other math topics. Try the given examples, or type in your own problem. Then click "Answer" to check your answer.

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