Learn how to use invertible change of basis matrices in linear algebra. From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to use invertible change of basis matrix to go between different coordinate systems.
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How To: Find a number given Its percent

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How To: Find the Slope Given 2 Ordered Pairs

How To: Calculate percent composition for chemistry

How To: Write a sum/difference of logarithms as a logarithm

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How To: Reduce fractions to their lowest terms

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