File:Weierstrass substitution.png

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Summary

DescriptionWeierstrass substitution.png	Geometric interpretation of the Weierstrass substitution $t=\tan \left({\varphi \over 2}\right)$
Date	10 December 2005
Source	Done in Mathematica by Fibonacci
Author	Fibonacci

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File history

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	Date/Time	Dimensions	User	Comment
current	05:59, 11 December 2005	1,600 × 800 (14 KB)	Fibonacci	Black, not grey, letters.
	05:55, 11 December 2005	1,600 × 800 (14 KB)	Fibonacci	Letters for geometric deduction of the tangent half-angle formulae.
	00:43, 11 December 2005	1,600 × 800 (10 KB)	Fibonacci	Okay, now it DOES look like a "t"...
	00:36, 11 December 2005	1,600 × 800 (10 KB)	Fibonacci	Thicker lines, better visibility.
	00:21, 11 December 2005	1,600 × 800 (10 KB)	Fibonacci	w:Tangent half-angle formula, or the Method of Last Resort (Weierstrass substitution) :<math>t=\tan({\varphi\over2})</math> {{Information\| \|Description = Tangent half-angle formula \|Source = Done in Mathematica by [[User:Fibonacci