# Functions

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These online videos and calculus study materials can help you find the zeros of a polynomial function, transform and reflect functions, graph integer power functions and greatest integer functions, and more. Try one today—they're 100% free.
 Polynomial approximation of functions (part 7)     In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 7 of 7. Khan Academy Polynomial approximation of functions (part 6)     In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 6 of 7. Khan Academy Polynomial approximation of functions (part 4)     In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 4 of 7. Khan Academy Approximating functions with polynomials (part 3)     In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 3 of 7. Khan Academy Polynomial approximation of functions (part 2)     In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 2 of 7. Khan Academy Polynomial approximation of functions (part 1)     In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 1 of 7. Khan Academy Function Graphing Calculator     An online graphing calculator for students who do not have a hand-held one. algebra.help Calculus Help Sheet     Very extensive help sheet that contains everything from simple derivative/integration formulas, to quick explanations of advanced derivation and integration techniques. Pauls Online Math Notes Calculus I Notes     Several example problems and tutorials dealing with differential calculus Pausl 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
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