Activity
Math Is Fun

Math Is Fun: Trigonometry

For Students 9th - 10th Standards
Students explore trigonometry concepts through this collection of definitions, lessons, examples problem-solving steps and strategies, and practice problems. Topics include solving triangles, trigonometric functions, theorems, and the...
Activity
Lawrence Hall of Science

The Math Page: Trigonometry: Trignometry of Right Triangles

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains the trigonometry of a right triangle, including finding the values of all six trig functions given a single value. There are example problems solved, problems for the student to...
Activity
Other

Gcse Answers' Easy Start Trigonometry

For Students 9th - 10th
Some basic questions dealing with everyday situations where trigonometry is needed to solve the problem. Click a button for the solutions.
Unit Plan
Khan Academy

Khan Academy: Trigonometry

For Students 9th - 10th
Reviews the basics of trigonometry and how its concepts are instrumental in computer graphics programming.
Activity
National Council of Teachers of Mathematics

The Math Forum: High School Archive for Trigonometry

For Students 9th - 10th
This site from the Math Forum with Dr. Math is an excellent site with answers to submitted questions on trigonometry. In addition the student can submit their own questions. Links are provided for additional information.
Activity
Other

Math Mistakes: Common Trigonometry Mistakes

For Students 9th - 10th
Learn from other student's mistakes by reviewing examples of the following Trigonometry topics: values of trigonometric functions, values of inverse trigonometric functions, solving triangles, simplifying trigonometric expressions, and...
Activity
Texas Instruments

Texas Instruments: Basic Trigonometry

For Teachers 9th - 10th
Students will define basic terms relating to trigonometry and use trigonometric ratios.
Website
Other

Interactive Trigonometry

For Students 9th - 10th Standards
Resource contains interactive programs that can be manipulated and animation to help students grasp basic concepts in trigonometry.
Handout
Other

University of Cambridge: Spherical Trigonometry

For Students 9th - 10th
Very good site that acts as a tutorial/review site on Spherical Trigonometry. Many diagrams and formulas are included.
Activity
Texas Instruments

Texas Instruments: Basic Trigonometry Love or Leave It!!

For Teachers 9th - 10th
This activity has the teacher to create 3 triangles on Cabri Jr. on the TI-83 or TI-84. It will prove to students how trigonometry ratios are found. It will show to the students where the ratios are derived rather than just telling the...
Activity
University of Regina (Canada)

University of Regina: Math Central: Real World Applications of Trigonometry

For Students 9th - 10th
Trigonometry is applied in two different real world situations. Students can calculate the solutions to each problem and comprehend how trigonometry is used in real life.
Interactive
Mangahigh

Mangahigh: Shape: Use Trigonometry to Find Lengths

For Students 9th - 10th Standards
Use trigonometry tp solve for lengths of sides.
Interactive
Mangahigh

Mangahigh: Shape: Use Trigonometry to Find Angles

For Students 9th - 10th Standards
Use trigonometry to determie the angle measures.
Activity
Lawrence Hall of Science

The Math Page: Trigonometry: The Law of Sines

For Students 9th - 10th Standards
Work through an explanation of the law of sines, how it is used with an obtuse angle, and a proof of the law of sines. Great site for students studying trigonometry.
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Applications

For Students 9th - 10th Standards
This lesson focuses on the real world applications using triangles and trigonometry.
Interactive
Mangahigh

Mangahigh: Shape: Area of a Triangle Using Trigonometry

For Students 9th - 10th Standards
Teat your knowledge of determing the area of a triangle using trigonometry.
Activity
Analyze Math

Analyze Math: Trigonometry: Sum and Difference Formulas Examples

For Students 9th - 10th Standards
The mathematics tutorial examines trigonometric formulas. The tutorial consists of examples with solutions. The tutorial demonstrates how to use sum and difference formulas to solve problems in trigonometry.
Unknown Type
Khan Academy

Khan Academy: Adding and Decomposing Vectors Using Trigonometry

For Students 9th - 10th
Use trigonometry to practice adding, decomposing, and finding vector angles from physics word problems.
Handout
Math Open Reference

Math Open Reference: Trigonometry Functions Introduction

For Students 9th - 10th Standards
A complete reference guide to trigonometry functions. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Handout
Math Open Reference

Math Open Reference: Cosine (Cos) Function Trigonometry

For Students 9th - 10th
A complete reference guide to the cosine function in trigonometry. It provides definitions, examples, and an interactive activity that enhances further explanation.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Inverses of Trigonometric Functions

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to find the domain and range of inverse trigonometric functions by utilizing the reflection principle.
Activity
Wolfram Research

Wolfram Math World: Trigonometry

For Students 9th - 10th Standards
This site provides a good definition of trigonometry. Includes many links to key terms and many more to related terms. This site may be used as a refresher for students who have finished the course, or students currently studying the...
eBook
Math Planet

Math Planet: Pre Algebra: Trigonometry

For Students 9th - 10th
Learn about trigonometry by viewing examples and a video lesson.
Activity
TeachEngineering

Teach Engineering: Trigonometry via Mobile Device

For Teachers 9th - 10th
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.

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