/ ________\ | / x | asin\\/ 1 - E /
asin(sqrt(1 - E^x))
x - 2 -e ------------- ________ / x 2*\/ 1 - E
x / x \ - | e | 2 -|1 + ------|*e | x| \ 1 - e / ----------------- ________ / x 4*\/ 1 - e
x / 2*x x \ - | 3*e 4*e | 2 -|1 + --------- + ------|*e | 2 x| | / x\ 1 - e | \ \1 - e / / ----------------------------- ________ / x 8*\/ 1 - e