https://www.khanacademy.org › math › precalculus › x9e81a4f98389efdf:trig

Precalculus 10 units · 131 skills. Unit 1 Composite and inverse functions. Unit 2 Trigonometry. Unit 3 Complex numbers. Unit 4 Rational functions. Unit 5 Conic sections. Unit 6 Vectors. Unit 7 Matrices. Unit 8 Probability and combinatorics.

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Get ready for Precalculus! Learn the skills that will set you up for success in complex numbers; polynomials; composite and inverse functions; trigonometry; vectors and matrices; series; conic sections; and probability and combinatorics.

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We can compose functions by making the output of one function the input of another one. This simple-yet-rich idea opens up a world of fascinating applications. Inverse functions undo each other when we compose them.

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This video covers the definition of a function, how to find the domain of a function, and how to find the zeros of a function.

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This precalculus provides a basic introduction into functions and graphs. It contains plenty of examples and multiple choice practice problems.Full 51 Minut...

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Why they are called hyperbolic functionsPractice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/precalculus/hyperbolic_t...