A = Intersect(xAxis, yAxis)
B = (1, 2)
C = (-1, 1)
u = Vector(A, C)
v = Vector(A, B)
a: x(B) * x(C) + y(B) * y(C)
u1: x(C)
u2: y(C)
v1: x(B)
v2: y(B)
texto1: "Produto escalar :
$\vec u \cdot \vec v = (" + (LaTeX[u1]) + ")\times(" + (LaTeX[v1]) + ")+(" + (LaTeX[u2]) + ")\times(" + (LaTeX[v2]) + ") = " + (LaTeX[a]) + "$"
α = Angle(v, u)
texto2: "Ângulo entre $\vec u$ e $\vec v$:
$∡(\vec u, \vec v) =" + (LaTeX[α]) + ""