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Straight lines, 3D, cosines, Pythagoras

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More videos: parametric equations/ planes, parallel/ skew lines

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Yet more videos to watch: basic operations & dot/ scalar product

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COMPLEX NUMBERS 1
Notes from "Understanding Pure Maths" by Sadler & Thorning

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COMPLEX NUMBERS 1
Notes from "Understanding Pure Maths" by Sadler & Thorning

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3D vectors