I need help with trigonometry questions please i know the answers but don't know the process to get the answers

" solve 2 cos (5x+10)=1 for 0<x<360" ans = 10 and 58

and also to solve 4 sin 2A= -3, for 0 ≤ A ≤ 2 Pi Answer = 76.72 and 166.72

please if you could show me the process it would be much appreciated as i have being trying for a few days now and am getting no where