Heft 1

Satz des Pythagoras: $a^2+b^2=c^2$

$h^2=s^2-{\left({\displaystyle \frac{a}{2}}\right)}^2$ oder $h^2=k^2+{\left({\displaystyle \frac{a}{2}}\right)}^2$

Sinus: $\sin (\alpha )={\displaystyle \frac{\text{Gegenkathete}}{\text{Hypotenuse}}}$

$\sin (\alpha )={\displaystyle \frac{k}{s}}$

Tangens: $\tan (\beta )={\displaystyle \frac{\text{Gegenkathete}}{\text{Ankathete}}}$

$\tan (\beta )={\displaystyle \frac{k}{{\displaystyle \frac{a}{2}}}}$