Trigonometrie
From SkyWiki
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| - | == Summen und Differenzen == | + | == Summen und Differenzen -> Produkt == |
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<math>\sin\alpha + \sin\beta = 2 \sin\frac{\alpha+\beta} 2 \cos\frac{\alpha-\beta} 2</math> | <math>\sin\alpha + \sin\beta = 2 \sin\frac{\alpha+\beta} 2 \cos\frac{\alpha-\beta} 2</math> | ||
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<math>\cos\alpha - \cos\beta = -2 \sin\frac{\alpha+\beta} 2 \sin\frac{\alpha-\beta} 2</math> | <math>\cos\alpha - \cos\beta = -2 \sin\frac{\alpha+\beta} 2 \sin\frac{\alpha-\beta} 2</math> | ||
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| + | == Produkt -> Summen oder Differenz == | ||
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| + | <math>2 \sin\alpha \sin\beta = \cos(\alpha-\beta} - \cos(\alpha+\beta)</math> | ||
[[category:Mathematik]] | [[category:Mathematik]] | ||
Revision as of 21:46, 16 September 2008
Contents |
Definitionen
Symmetrieen
trigonometrische Äquivalenzen
Additionstheoreme
doppelte Winkel
halbe Winkel
Summen und Differenzen -> Produkt
Produkt -> Summen oder Differenz
