________ / 2 x*\/ 1 - x - acos(x)
x*sqrt(1 - x^2) - acos(x)
________ 2 / 2 1 x \/ 1 - x + ----------- - ----------- ________ ________ / 2 / 2 \/ 1 - x \/ 1 - x
/ 2 \ | 1 x | x*|-3 + ------ - ------| | 2 2| \ 1 - x 1 - x / ------------------------ ________ / 2 \/ 1 - x
2 4 2 1 6*x 3*x 3*x -3 + ------ - ------ - --------- + --------- 2 2 2 2 1 - x 1 - x / 2\ / 2\ \1 - x / \1 - x / -------------------------------------------- ________ / 2 \/ 1 - x