This page will make an xy plot of some mathematical expression for you. Including sin(x), cos(x), and tan(x).
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WebMath
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An excellent source of examples and facts. This site also provides online flashcards for students to test their knowledge of the identities and trig functions.
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mathmistakes.info
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This website will allow student to practice basic trig functions and graphs. This is a very basic overview of sine, cosine and tangent.
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Math.com
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A description of angles measured in standard position and their reference angles. The site offers some great visuals for examples of angles that terminate in each quadrant.
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Regents Prep: Algebra II/Trig
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A Calculator sufficient for advanced algebra and trigonomic functions.
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Math Open Reference
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A list of most common trigonometric identities. Includes values of trig functions of most common angles.
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math2.org
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