/ 2 t*acos(t) \ -3*|------- + -----------|*acos(t) | 2 3/2| |-1 + t / 2\ | \ \1 - t / /
/ 2 2 2 \ | 2 acos (t) 3*t *acos (t) 6*t*acos(t)| 3*|- ----------- - ----------- - ------------- + -----------| | 3/2 3/2 5/2 2| | / 2\ / 2\ / 2\ / 2\ | \ \1 - t / \1 - t / \1 - t / \-1 + t / /