x*sin(a) - asin(x) ------------------ - a x
(x*sin(a) - asin(x))/x - a
1 - ----------- + sin(a) ________ / 2 \/ 1 - x x*sin(a) - asin(x) ---------------------- - ------------------ x 2 x
/ 1 \ 2*|- ----------- + sin(a)| | ________ | | / 2 | 1 \ \/ 1 - x / 2*(-asin(x) + x*sin(a)) - ----------- - -------------------------- + ----------------------- 3/2 2 3 / 2\ x x \1 - x /