Help please (1 Viewer)

[cookiez69]

For what values of m is the line y = mx a tangent to the circle (x-4)^2 + y^2 = 4.

Thank you in advance, and much appreciated :]

 

[nightweaver066]

Sub y = mx in to the circle.

Expand and simplify.

Use discriminant = 0 (1 intersection for the line to be a tangent).

Solve for values of m.