simplify the trigonometric expression.cos^2 theta/1-sin thetathe answer is 1 + sin theta but i dont know how to get that please help

Recall that sin²Ф+cos²Ф=1, 
so cos²Ф=1-sin²Ф=(1+sinФ)(1-sinФ)
the (1-sinФ) in the numerator cancel with the (1-sinФ) in the denominator, the result is 1+sinФ