T834 / JUURIKERTAUS

f(x) = If[(-π) ≤ x ≤ π, sin(x)]
a = Surface(t, (sin(t) * cos(s)), (sin(t) * sin(s)), t, (-π), π, s, (-2 / 3 * π), (3 / 4 * π))
teksti1 = LaTeX(f, true, true)