Trigonometrie
From SkyWiki
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== halbe Winkel == | == halbe Winkel == | ||
| - | <math>\sin^2\frac\alpha 2 = \frac 1 2 (1 - \cos\alpha)</math> | + | {| |
| - | + | |<math>\sin^2\frac\alpha 2 = \frac 1 2 (1 - \cos\alpha)</math> | |
| - | <math>\cos^2\frac\alpha 2 = \frac 1 2 (1 + \cos\alpha)</math> | + | |<math>1 - \cos 2\alpha = 2 \sin^2\alpha</math> |
| - | + | |- | |
| - | <math>\tan^2\frac\alpha 2 = \frac {1 - \cos\alpha}{1 + \cos\alpha}</math> | + | |<math>\cos^2\frac\alpha 2 = \frac 1 2 (1 + \cos\alpha)</math> |
| - | + | |<math>1 + \cos 2\alpha = 2 \cos^2\alpha</math> | |
| + | |- | ||
| + | |<math>\tan^2\frac\alpha 2 = \frac {1 - \cos\alpha}{1 + \cos\alpha}</math> | ||
| + | |} | ||
[[category:Mathematik]] | [[category:Mathematik]] | ||
Revision as of 21:34, 16 September 2008
Contents |
trigonometrische Äquivalenzen
Additionstheoreme
doppelte Winkel
