A description of the process of graphing trig expressions.
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Ask Dr. Math
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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An online graphing calculator for students who do not have a hand-held one.
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algebra.help
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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.
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Table of Trigonometric Identities
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Explains how we can use the unit circle to find the trig functions for any angle, explains inverse functions, and how to graph them.
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Dave's Short Trig Course
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This webpage contains applications for trigonometric functions and graphs. Specifically these applications are for harmonic motion and angular velocity. The website has sample problems (with answers) and uses animations to allow students to experiment with concepts.
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Interactive Mathematics
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The perfect study site for high school, college students and adult learners. Get help to do your homework, refresh your memory, prepare for a test, ....
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SOS math
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Step-by-step solutions to odd-numbered problems from dozens of precalculus textbooks.
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Hotmath
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A discussion of the changes in formula and the corresponding changes in graph.
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Ask Dr. Math
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