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Mathematics
Mathematics
Problem
Find the radius of the circle
(
x
cos
α
+
y
sin
α
−
a
)
2
+
(
x
sin
α
−
y
cos
α
−
b
)
2
=
k
2
(x \cos \alpha + y \sin \alpha - a)^2 + (x \sin \alpha - y \cos \alpha - b)^2 = k^2
(
x
cos
α
+
y
sin
α
−
a
)
2
+
(
x
sin
α
−
y
cos
α
−
b
)
2
=
k
2
and if
α
\alpha
α
varies, find the locus of its centre.
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