Below is the prove of the equation

because(sin/because+because/sin)=because(sin^2 +because^2/because sin)

As sin^2 +because^2=1

So because(1/sin because )=csc

Hence proved that left side is equal to right side.

because(sin/because+because/sin)=because(sin^2 +because^2/because sin)

As sin^2 +because^2=1

So because(1/sin because )=csc

Hence proved that left side is equal to right side.