1. The problem statement, all variables and given/known data (tan/(1-cot))+(cot/(1-tan))=1+(sec)(csc) 3. The attempt at a solution This problem showed up in my class as a warm-up, and when my teacher tried to solve it for us he got stuck. I've asked a few classmates in higher level math, and they all seem to get stuck. I myself have tried to prove the identity. I managed to simplify the right side down to (tan*cot)+(tan*cot)/(sin*cos) but I get stuck after this. Any help is much appreciated. Thanks!