[" Find the condition that the tangetits draw n from "(0,0)" to "],[S=x^(2)+y^(2)+2gx+2f/4+c=0" be perperwiculur to cach other."]

Find the condition that the tangents drawn from (0, 0) to S -= x^(2) + y^(2) + 2 gx + 2fy + c = 0 be perpendicular to each other.

Find the condition that the tangents drawn from (0, 0) to S -= x^(2) + y^(2) + 2 gx + 2fy + c = 0 be perpendicular to each lt brgt other.

Find the conditions that the tangents drawn from the exteriorpoint (g,f) to S= x^(2) + y ^(2) + 2gx + 2fy + c=0 are perpendicular to each other.

Fing the condition that the tangents drawn from the exterior point (g, f) to S -= x^(2) + y^(2) + 2 gx + 2fy + c=0 are perpen- dicular to each other.

The condition that the pair of tangents drawn from origin to circle x^(2)+y^(2)+2gx+2fy+c=0 may be at right angles is

The condition that the pair of tangents drawn from origin to circle x^(2)+y^(2)+2gx+2fy+c=0 may be at right angles is

The condition that the pair of tangents drawn from origin to the circle x^(2)+y^(2)+2gx+2fy+c=0 may be at right angle is

The tangents drawn from the origin x^2+y^2+2gx+2fy+f^2=0 are perpendicular if

Find the coodition that the straight line lx+my+n=0 is a normal to the circle x^(2)+y^(2)+2gx+2fy+c=0