Trigonometrie
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<math>\tan(\varphi) \cdot \cot(\varphi) = 1, \quad \varphi \ne k\cdot 90 ^\circ</math> | <math>\tan(\varphi) \cdot \cot(\varphi) = 1, \quad \varphi \ne k\cdot 90 ^\circ</math> | ||
| - | <math>1 + \tan^2(\varphi) = \frac 1 \cos(\varphi), \quad \varphi \ne (2k+1)\cdot 90^\circ | + | <math>1 + \tan^2(\varphi) = \frac 1 \cos^2(\varphi), \quad \varphi \ne (2k+1)\cdot 90^\circ</math> |
| + | <math>1 + \cot^2(\varphi) = \frac 1 \sin^2(\varphi), \quad \varphi \ne k\cdot 180^\circ</math> | ||
[[category:Mathematik]] | [[category:Mathematik]] | ||
Revision as of 21:06, 16 September 2008
trigonometrische Äquivalenzen
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