asin(1 - x)
-1 ----------------- ______________ / 2 \/ 1 - (1 - x)
-(-1 + x) ----------------- 3/2 / 2\ \1 - (1 - x) /
/ 2 \ | 3*(-1 + x) | -|1 + ------------| | 2| \ 1 - (1 - x) / -------------------- 3/2 / 2\ \1 - (1 - x) /