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  • If the line y = mx-2 is tangent to the circle , then<stron

If the line y = mx-2 is tangent to the circle x^2+y^2=4, then

Option: 1

m = 1


Option: 2

m = -2


Option: 3

m = 2


Option: 4

m = 0


Answers (1)

best_answer

Given equation of the circle is x^2+y^2=4

a = 2

Equation of line , y = mx -2 

Since the line is tangent to the circle, so

\\2=\frac{|-2|}{\sqrt{1+m^2}}\\\Rightarrow m=0

Posted by

HARSH KANKARIA

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