What the hell are Asin, Arcos and Atan? What does it have to do with sin, cos and tan? Is there an analytical formula?
Asin, acos and atan should be functions (programs) in Matlab, which are mathematically denoted as (standardized notation) arcsin, arccos, arctan, sin, cos, and tan. The limits are [-pi/2, pi/2], [0, pi] and (-pi/2, pi/2) respectively. (Trigonometric function itself has no inverse function)