Prove that SinA/1-CotA + Cos A/1 - Tan A = CosA + Sin A
in future, use (grouping symbols) to make your expressions clearProve that SinA/(1-CotA) + Cos A/(1 - Tan A) = CosA + Sin A
working from the left side ...
start by multiplying the first term by $\dfrac{\sin{A}}{\sin{A}}$ and the second term by $\dfrac{\cos{A}}{\cos{A}}$