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VITEEE 2021
MCQ (Single Correct Answer)
+4
-1

The radius of the circle $$(x \cos \theta+y \sin \theta-a)^2+(x \sin \theta-y \cos \theta-b)^2=k^2$$ is

A
$$a^2+b^2-k^2$$
B
$$a \sin \theta-b \cos \theta$$
C
$$a^2+b^2$$
D
$$k$$
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