> In fact, if I'm totally honest, I'm not 100% I completely understand the s... | Hacker News

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Bognar on May 7, 2013 | parent | context | favorite | on: "I can't do math" (2001)

> In fact, if I'm totally honest, I'm not 100% I completely understand the sine function now.

I've found this .gif does wonders for explaining sine and cosine to people:

http://www.butlercc.edu/mathematics/math_courses/ma140/SineC...

Sine is horizontal, cosine is vertical.

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