Learn how to solve proving trigonometric identities problems step by step online. Prove the trigonometric identity (csc(y)tan(y))/sec(y)=1. Starting from the left-hand side (LHS) of the identity. Applying the tangent identity: \displaystyle\tan\left(\theta\right)=\frac{\sin\left(\theta\right)}{\cos\left(\theta\right)}. Applying the cosecant identity: \displaystyle\csc\left(\theta\right)=\frac{1}{\sin\left(\theta\right)}. Multiplying fractions \frac{1}{\sin\left(y\right)} \times \frac{\sin\left(y\right)}{\cos\left(y\right)}.

Prove the trigonometric identity (csc(y)tan(y))/sec(y)=1