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Question

The equation of the circle whose centre is (3,4) and which touches the line 5x+12y=1 is x2+y2−6x−8y+381169=0.

A
True
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B
False
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Solution

The correct option is A True
Let r be the radius of the circle.

Then,

r=distance of the centre i.e. point (3,4) from the line 5x+12y=1.
=|15+48125+144=6213

Hence, the equation of the required circle is (x3)2+(y4)2=(6213)2.

x2+y26x8y+381169=0

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