Krishna
0

Step 1: Recall the suitable trigonometric identity

            GIVEN:   \frac{\sin^2 \theta}{1 - \cos^2 \theta}

            IDENTITY:   \sin^2 \theta + \cos^2 \theta = 1

                               \sin^2 \theta = 1 - \cos^2 \theta ........................(1)


Step 2: Simplify the given equation by the identity  

               = \frac{\sin^2 \theta}{1 - \cos^2 \theta}

               =   \frac{\sin^2 \theta}{\sin^2 \theta}  [Since equation (1)]

               = 1