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Which of the following equations gives a circle?
\[\begin {array} {1 1} (a)\;r= 2 \sin \theta & \quad (b)\;r^2\cos 2 \theta=1 \\ (c)\;r(4 \cos \theta+ 5 \sin \theta)=3 & \quad (d)\;5= r (1+\sqrt 2 \cos \theta) \end {array}\]
jeemain
eamcet
math
2005
q59
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Nov 12, 2013
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$(a)\;r= 2 \sin \theta$
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Feb 27, 2014
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meena.p
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