# Trigonometric Identities

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 Introduction to Physics (Basic Math)     In this video, Dr. Radi Al-Jishi provides an introduction to the basic math used in physics. Educator.com trig formulas     trig formulas StudyStack Online Scientific Calculator     A helpful scientific calculator that runs in your web browser window. Holt Online Learning Trig Identities     A very easy-to-read list of basic trig identities. Mathwords Trig without Tears     Detailed instruction on trigonometric identities, functions, special angles, Law of Sines and Cosines, and inverse trigonometric functions. Mathematics Articles by Stan Brown Trig Formula/Identity Help Sheet     Contains formulas to help with pythagorean identities, unit circle values, periods of trig functions, angle addition identities, and much more. Pauls Online Math Notes Table of Trigonometric Identities     Almost all of the Trigonometric Identities, including Reciprocal identities, Pythagorean identities, Quotient identities, Co-Function identities, Even-Odd identities, Sum-Difference formulas, Double- and Half-angle formulas, and Sum-to-Product and Product-to-Sum formulas. Table of Trigonometric Identities A Trick to Remember the Unit Circle Values     This youtube video shows an easy way to remember the values of the unit circle that can be helpful for trigonometry students. Unit Circle Tricks Solve Trigonometric Equations     How to solve trigonometric equations. SOS Math Common Trig Errors     Several worked example problems that point out mistakes students usually make when solving them. Pauls Online Math Notes
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