Ausgehend von der linken Seite (LHS) der Identität

Applying the trigonometric identity: $\cot\left(\theta \right) = \frac{\cos\left(\theta \right)}{\sin\left(\theta \right)}$

Wenden Sie die Formel an: $\frac{\frac{a}{b}}{a}$$=\frac{1}{b}$, wobei $a=\cos\left(b\right)$, $b=\sin\left(b\right)$, $a/b=\frac{\cos\left(b\right)}{\sin\left(b\right)}$ und $a/b/a=\frac{\frac{\cos\left(b\right)}{\sin\left(b\right)}}{\cos\left(b\right)}$

Since we have reached the expression of our goal, we have proven the identity