Calculus
cot(P)=6\cot\left(P\right)=6
cot(P)=135\cot\left(P\right)=\frac{1}{\sqrt{35}}
cot(P)=35\cot\left(P\right)=\sqrt{35}
cot(P)=635\cot\left(P\right)=\frac{6}{\sqrt{35}}