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Starting from the right-hand side (RHS) of the identity
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$\frac{\cos\left(a\right)}{\sin\left(a\right)}$
Learn how to solve problems step by step online. Prove the trigonometric identity cot(a)=cos(a)/sin(a). Starting from the right-hand side (RHS) of the identity. Apply the trigonometric identity: \frac{\cos\left(\theta \right)}{\sin\left(\theta \right)}=\cot\left(\theta \right), where x=a. Since we have reached the expression of our goal, we have proven the identity.