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Condition for y = mx + c to be a tangen...

Condition for y = mx + c to be a tangent to the circle ` x^(2) + y^(2) = a^(2) ` is

A

`c^(2) = a^(2) (1 - m)^(2)`

B

`(|C|)/(sqrt(1 + m^(2))) = a `

C

`(|C|)/(sqrt(1+m^(2)) = `radius

D

` c= a/m`

Text Solution

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The correct Answer is:
B
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