In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 1 of 7.
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Khan Academy
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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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Very extensive help sheet that contains everything from simple derivative/integration formulas, to quick explanations of advanced derivation and integration techniques.
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Pauls Online Math Notes
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Several example problems and tutorials dealing with differential calculus
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Pausl Online Math Notes
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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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Step-by-step solutions to odd-numbered problems from dozens of calculus textbooks.
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Hotmath
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Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
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Paul's Online Math Notes
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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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In this video, Salman Khan of Khan Academy explains parametric equations. Part 3 of 4.
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Khan Academy
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