Longueur du tir

Vitesse = 30.7 (slider from 1 to 100, step 0.1)
f(x) = (-9.81) / (2 * (Vitesse * cos(π / 4))^(2)) * x^(2) + 0.9999999999999999 * x + 0.35
A, B = Intersect(f, xAxis)
Longueur = Segment(A, B)