Beautiful Trigonometry - Numberphile

https://www.youtube.com/watch?v=snHKEpCv0Hk

Publisher, Numberphile, Ben Sparks, Video, YouTube

An explanation of sine, cosine and tangent using a circle.
Sine and cosine are the y and x-coordinates of a point moving in a circle.

See also the GeoGebra applet.

12 October 2020 Edit: 12 October 2020


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