f(x) = sqrt(x^(2) - 1)
t = 3.141592653589793 rad (slider from 0 to 180*°, step 1*°)
g(x) = 2 + x^(2) / 4
f_1 = Rotate(f, t, yAxis)
g_1 = Rotate(g, t, yAxis)
h(x) = 3
V1_1 = 7.5
V2_1 = -0.5
V = 31.4159265359