1. The problem statement, all variables and given/known data Find the solution set of the equation below for the interval 0° ≤ x ≤ 360°: arccos(x) - arcsin(1-x) = 90° 2. Relevant equations all given above. 3. The attempt at a solution i tried to consider (1-x) as "complementary" but I'm not really sure about that and I would like to know your opinion if I should go for it? And I'm kinda confused why the RHS is in degrees. Is it because the problem is dealing with inverse trig equations (which the answers are supposed to be angles)? Thanks in advance.