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# Trigonometry resources online

**Trigonometry**

**Dave's Short Trig Course**

Explanations on trigonometry concepts with interactive applets.

www.clarku.edu/~djoyce/trig/

**The Math Page: Trigonometry**

Tutorials on various trigonometry topics accompanied with exercises where the answer is revealed with a mouseover.

www.themathpage.com/aTrig/trigonometry.htm

**Trigonometry Help at Math-Mate**

Tutorials for basic trig topics, such as: naming the sides of a right triangle, ratios between the side lengths, using trigonometry to work out side lengths, trigonometry on the calculator, using Pythagoras' Theorem, application problems in trigonometry.

www.math-mate.com/chapter26.shtml

**Trigonometry Realms**
from Zona Land

"*When you understand this animated diagram, you shall understand the sin(x)*." Detailed explanations relating the basic trigonometric functions to the right triangle. Check their Point Definitions for Trig Functions page, where a dynamic graph shows the relationships between the unit circle graph and the standard graph and the right triangle definition of the trigonometric functions.

zonalandeducation.com/mmts/trigonometryRealms/trigonometryRealms.html

**Trigonometric Functions from Interactive Mathematics**

A full online tutorial on trigonometry topics. Has interactive quizzes after each section.

www.intmath.com/Trigonometric-functions/Trig-functions-intro.php

**Maths Online Gallery: Trigonometric Functions**

Collection of Java applets with exercises for the student. The *Definition of trig functions* applet illustrates the right-triangle definitions and comes with* *exercises to guide the exploration. Also included applet *Triangle and Law of Sines* and *Recognize graphs* puzzles.

www.univie.ac.at/future.media/moe/galerie/wfun/wfun.html#winkelf

**Trigonometric Functions and Calculus for Liberal Arts and Business Majors**

A complete tutorial online—modeling with sine function, the six trigonometric funtions, their derivatives and integrals. Includes exercises and answers to odd-numbered ones.

www.zweigmedia.com/RealWorld/trig/trigintro.html

**Trick for Teaching Basic Trig**

A trick ("a touching hand") for understanding and remembering what "opposite" and "adjacent" mean in a right triangle.

untilnextstop.blogspot.com/2011/02/trick-for-teaching-basic-trig.html

**The exact values for the sine of integer angles**

How do you find exact values for the sine of integer angles? This post explains them plus have a PDF file listing all exact values of sine for integer angles.

www.squarecirclez.com/blog/how-do-you-find-exact-values-for-the-sine-of-all-angles/6212

**MathTV.com**

Over 6,000 free, online video lessons for basic math, algebra, trigonometry, and calculus. Videos also available in Spanish. Also includes online textbooks. I've written a review of MathTV lessons when they used to be offered on CDs.

www.mathtv.com

**Trigonometry Help Sheet**

A printable chart for solutions for right triangles. Shows the formula for the unknown sides & angles when you know two sides, or side and an angle.

www.cadproblems.us/forms/Schwendau_Trig_Chart.pdf

**BrightStorm Math**

Over 2,000 free videos covering all high school math topics from algebra to calculus. Registration required (free).

www.brightstorm.com/math

**Trigonometry Definitions Reference Sheet**

Both online and printable versions; the sheet includes both right triangle definitions and unit circle definitions for all trig functions.

www.eeweb.com/toolbox/trigonometry-definition-reference-sheet

**Explorelearning Trigonometry Gizmos**

Gizmos (interactive online activities with exploration guides) for cosine, sine, and tangent functions, unit circle, simplifying, translating and scaling trig functions.* Try their free trial
account. Dynamical guided exploring with these gizmos promotes
understanding. Excellent resource!*

www.explorelearning.com/index.cfm?method=cResource.dspResourcesForCourse&CourseID=254

**Trigonometric Functions Mathplet**

This Java applet is worth checking since while graphing the
function it shows the angle changing on the unit circle. However, you can't scale the graph paper.

www.magnus-karlsson.nu/matte/trig/trigfunc.html