[College Trig] Find the CSC

problem/answer-https://gyazo.com/fc74b4c0cae166cb89b879e8ed1aa80c

Hi, I don't understand how the answer is the square root of 5. The way I calculated it was sin is 1 as the cot is -2 and therefore the answer for csc (1/sin) would just be 1. How are they getting the square root of 5. Thanks for the help.