Close #9

Formelsammlung.tex

@@ -168,12 +168,12 @@
 
 \begin{tablebox}{l|l|l}
 \textbf{x,y} & \textbf{(in Grad)} & \textbf{(im Bogenmaß)} \\ \hline	
-$x > 0, y \ge 0$    & $\varphi = \arctan \cfrac{y}{x} $ & $\varphi = arctan \cfrac{y}{x}$  \\
-$x < 0$   & $\varphi = \arctan \cfrac{y}{x} + 180^\circ $ & $\varphi = arctan \cfrac{y}{x} + \pi $ \\
-$x > 0, y \le 0 $ & $\varphi = \arctan \cfrac{y}{x} + 360^\circ $  & $\varphi = \arctan \cfrac{y}{x} + 2\pi $   \\
-$x = 0, y > 0 $ & $\varphi = 90^\circ $ &   $\varphi = \cfrac{\pi}{2} $           \\
-$x = 0, y < 0 $   & $\varphi = 270^\circ $     &      $\varphi = \cfrac{3}{2}\pi $        \\
-$x = 0, y = 0 $   & $\varphi = 0^\circ $    &       $\varphi = 0 $       \\ 
+$a > 0, b \ge 0$    & $\varphi = \arctan \cfrac{b}{a} $ & $\varphi = arctan \cfrac{b}{a}$  \\
+$a < 0$   & $\varphi = \arctan \cfrac{b}{a} + 180^\circ $ & $\varphi = arctan \cfrac{b}{a} + \pi $ \\
+$a > 0, b \le 0 $ & $\varphi = \arctan \cfrac{b}{a} + 360^\circ $  & $\varphi = \arctan \cfrac{b}{a} + 2\pi $   \\
+$a = 0, b > 0 $ & $\varphi = 90^\circ $ &   $\varphi = \cfrac{\pi}{2} $           \\
+$a = 0, b < 0 $   & $\varphi = 270^\circ $     &      $\varphi = \cfrac{3}{2}\pi $        \\
+$a = 0, b = 0 $   & $\varphi = 0^\circ $    &       $\varphi = 0 $       \\ 
 \end{tablebox}