如何測得仰角與俯角
Author: 藍邦偉  老師

如何測得仰角與俯角

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C = (1.84, 4.82)
θ = -1.5 (slider from -1.5 to 1.5, step 0.01)
α: θ
E = (2.0140000000000007, 1.3299999999999998)
e: y = y(E)
D: C - (0, 7)
D_1: D + (0.15, 0)
C_1: C + (0.15, 0)
d = Semicircle(C_1, D_1)
G = Intersect(d, e)
r = Distance(E, G)
A = (-0.07599999999999967, 0.5159999999999997)
B: A + (0, 0.7)
a: y = y(B)
b: y = y(C)
M: 0.5 * C + 0.5 * D
c = Circle(C, D)
f = Ray(E, G)
g: x = x(E)
P: E + (r * cos(α), r * sin(α))
β = Angle(D_1, E, P)
F = (-4.08, 5.32)
γ = Angle(D_1, E, P)
文字3: "現在俯角為90°-" + γ + "=" + (90° - γ)
i: x = x(C)
文字2: "現在仰角為" + β + "-90°=" + (β - 90°)
Q: E + ((r + 1.5) * cos(α), (r + 1.5) * sin(α))
h = Vector(E, Q)
H = Point(f)
j: x = x(H)
k = Ray(E, P)
I = Intersect(j, k)
n = 0 (slider from 0 to 5, step 1)
δ = Angle(Q, E, G)
文字7: If[y(I) > y(Q), "仰", "俯"] + "角為" + δ