r

xº

DB=r\times \sin x^o

r

\mbox{arc} AB =\displaystyle\frac{\pi}{180^o}\ r\times x^o, \ \mbox{quando}\ x \mbox{ é expresso em graus}

AC=r\times\tan x^o

r_1 = 2 (slider from 0.2 to 5, step 0.1)
O = (-0.23570697010310623, 1.3087118242864095)
c = Circle(O, r_1)
a: y = y(O)
b: x = x(O)
A = Intersect(c, a, 2)
B = Point(c)
d = Ray(O, B)
α = Angle(A, O, B)
e = OrthogonalLine(B, a)
f = OrthogonalLine(A, a)
C = Intersect(f, d)
D = Intersect(a, e)
E = Point(d)
G = Point(a)
u = Vector(O, G)
H = Point(b)
v = Vector(O, H)
I = Point(b)
J = Point(a)
g = Segment(J, O)
h = Segment(O, I)
i = Segment(O, E)
r = Segment(O, B)
j = Segment(D, B)
k = CircleArc(O, A, B)
l = Segment(A, C)
m = Segment(O, A)