α

α = 90°

f(x) = (0.5 * x^(2))
P = Point(f)
C9 = NaN
B1: P + (1, 0)
h = OrthogonalLine(B1, xAxis)
t = Tangent(P, f)
B2 = Intersect(t, h)
u1 = Vector(P, B1)
v1 = Vector(B1, B2)
Text1: "" + (x(u1)) + ""
Text2: "" + (y(v1)) + ""
gL: -2
m1 = Slope(t)
α = Angle(B1, P, B2)
β = Angle(B2, P, B1)
a: tan(β)
Text3: "α = -" + (LaTeX[β]) + ""
Text4: "α = " + (LaTeX[α]) + ""
m2: tan(α)
Text6: "tan(α) = " + (LaTeX[m2]) + ""
Text5: "f'(" + (LaTeX[x(P)]) + ") = " + (LaTeX[m1]) + ""