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Sine and Cosine - A Visual Explanation

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Freya Holmér

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These functions are super fundamental to trigonometry, as well as incredibly useful! Here's an example of how you can construct a 2D vector pointing at a given angle using trigonometry. Note that in this case it will always have a length of 1, also known as unit length, which means that by definition it's a normalized vector!

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posted by andisiwauo