________ / 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 3*x 3*x 6*x | -|3 + ------ + --------- + --------- + ------| | 2 2 2 2| | 1 - x / 2\ / 2\ 1 - x | \ \1 - x / \1 - x / / ----------------------------------------------- ________ / 2 \/ 1 - x