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Question: Answered & Verified by Expert
The parametric equations of the circle $x^2+y^2-6 x-2 y+9=0$ are
MathematicsCircleMHT CETMHT CET 2022 (08 Aug Shift 1)
Options:
  • A $x=1+\cos \theta, y=3+\sin \theta$
  • B $x=3+\cos \theta, y=1+\sin \theta$
  • C $x=3+\sin \theta, y=1+\cos \theta$
  • D $x=3+\sin \theta, y=1+\cos \theta$
Solution:
1092 Upvotes Verified Answer
The correct answer is: $x=3+\cos \theta, y=1+\sin \theta$
$\begin{aligned}
& x^2+y^2-6 x-2 y+9=0 \Rightarrow(x-3)^2+(y-1)^2=1^2 \Rightarrow x-3=\cos \theta \quad \text { and } \\
& y-1=\sin \theta
\end{aligned}$
Hence, parametric equation is $x=3+\cos \theta$ and $y=1+\sin \theta$

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