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JEE Main 2001Medium

Q.The condition that the line lx + my + n = 0 is tangent to the circlex2+y2=a2 x^2 + y^2 = a^2 is

a
a2(l2+m2)=n2a^2 (l^2 + m^2) = n^2
b
a2(l2+m2)=na^2 (l^2 + m^2) = n
c
a(l2+m2)=n2a (l^2 + m^2) = n^2
d
a2lm=n2a^2 l m = n^2

Correct Answer: Option A

The correct solution involves applying the fundamental concept to derive the final value step by step...

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