Question bank/JEE Main/Mathematics

The equation of circle with origin as the centre and passing
through vertices of an equilateral triangle whose median is of length
3a, is
o`Ùk dk lehdj.k gksxk ftl Unz ewy fcUnq gS rFkk leckgq f=kHkqt
ftl yEckbZ 3a gS]

A$x^{2} + y^{2} = 9a^{2}$B$x^{2} + y^{2} = 16a^{2}$C$x^{2} + y^{2} = 4a^{2}$D$x^{2} + y^{2} = a^{2}$

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$\sin 30^{\circ} = \frac{a}{r} \Rightarrow r = 2a$

Source: Grass-G / M-25 Mathematics Paper 7 Jan.docx