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Timeline for Fundamental Examples

Current License: CC BY-SA 3.0

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Apr 18, 2011 at 18:44 comment added Thierry Zell It's also a nice way to prove the trigonometric change of variable formulas with $t=\tan(\alpha/2)$. When I saw those in high-school, I believe we used brute force instead!
Apr 18, 2011 at 18:03 history edited Thierry Zell CC BY-SA 3.0
fixed an error in the formula
Jul 7, 2010 at 22:38 history answered David Corwin CC BY-SA 2.5