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