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| | www.johndcook.com
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| | How the Pythagorean theorem, law of sines, and law of cosines translate to hyperbolic geometry.
| | www.jeremykun.com
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| | In our last primer we saw the Fourier series, which flushed out the notion that a periodic function can be represented as an infinite series of sines and cosines. While this is fine and dandy, and quite a powerful tool, it does not suffice for the real world. In the real world, very little is truly periodic, especially since human measurements can only record a finite period of time. Even things we wish to explore on this blog are hardly periodic (for instance, image analysis).
| | corbettmaths.com
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| | The Ultimate GCSE Higher Maths Revision Video and Booklet - Edexcel AQA OCR - Corbettmaths
| | hadrienj.github.io
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| In this post, we will see special kinds of matrix and vectors the diagonal and symmetric matrices, the unit vector and the concept of orthogonality.