Find the equation of the pair of tangents from the origin to the circle `x^2 + y^2 + 2gx + 2fy+k^2 =
Channel: Doubtnut
Date: 12/04/2020

Find the equation of the pair of tangents from the origin to the circle `x^2 + y^2 + 2gx + 2fy+k^2 = 0`, and show that their intercept on the line `y = h` is `2hk/(k^2-g^2)` times the radius of the circle.