徑度量
Author: 藍邦偉  老師

徑度量

θ

$ \pi=180° $
$1=\frac{180°}{π}≈57.3°$
$1°=\frac{π}{180}$

θ

O: 0.5 * (Corner[1] + Corner[3])
u = Vector(O, (x(Corner[3]), y(O)))
v = Vector((x(O), y(Corner[1])), (x(O), y(Corner[3])))
A: O + (5, 0)
A_1: 0.8 * O + 0.2 * A
w = Vector(O, A)
r = Segment(O, A)
L_1 = Sequence(O + (r * cos(2 * k * 3.141592653589793 / 72), r * sin(2 * k * 3.141592653589793 / 72)), k, 1, 72)
L_2 = Sequence(Segment[O, O + (r * cos(2 * k * 3.141592653589793 / 72), r * sin(2 * k * 3.141592653589793 / 72))], k, 1, 72)
a = 0 (slider from -5 to 5, step 0.05)
Q_1: O + (5 * cos(2 * a * π), 5 * sin(2 * a * π))
z = Vector(O, Q_1)
α = Angle(A, O, Q_1)
text1: "$ 目前角度θ=" + (LaTeX[2 * a]) + "" + (LaTeX[If[a ≟ 0, "", "\pi"]]) + "徑=" + (LaTeX[360 * a]) + " ° $"
β = Angle(Q_1, O, A)
g = Circle(O, 5)
L_3 = Sequence(Circle[O, 0.5 * k], k, 1, 9)