If the angle between the tangents drawn to `x^2+y^2+2gx+2fy+c=0` from (0, 0) is `pi/2,` then `g^2+f^2=3c` `g^2+f^2=2c` `g^2+f^2=5c` `g^2+f^2=4c`

If the angle between tangents drawn to x^(2)+y^(2)+2gx+2fy+c=0 from (0,0) is (pi)/(2), then

If the angle between the tangents drawn to x^2+y^2+2gx+2fy+c=0 from (0, 0) is pi/2, then (a) g^2+f^2=3c (b) g^2+f^2=2c (c) g^2+f^2=5c (d) g^2+f^2=4c

If the angle between the tangents drawn to x^2+y^2+2gx+2fy+c=0 from (0, 0) is pi/2, then (a) g^2+f^2=3c (b) g^2+f^2=2c (c) g^2+f^2=5c (d) g^2+f^2=4c

If the angle between the tangents drawn to x^(2)+y^(2)+2gx+2fy+c=0 from (0,0) is (pi)/(2) then g^(2)+f^(2)=3cg^(2)+f^(2)=2cg^(2)+f^(2)=5cg^(2)+f^(2)=4c

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

If the angle between the two lines given by ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 is (pi)/4 , then the contsntant a,b,h,g,f,c are related by

If the angle between the two lines given by ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 is (pi)/4 , then the contsntant a,b,h,g,f,c are related by

The distance between the chords of contact of tangents to the circle x^2+y^2+2gx +2fy+c=0 from the origin & the point (g,f) is

The distance between the chords of contact of tangents to the circle x^2+y^2+2gx +2fy+c=0 from the origin & the point (g,f) is

The squared length of the intercept made by the line x=h on the pair of tangents drawn from the origin to the circle x^2+y^2+2gx+2fy+c=0 is (a) (4c h^2)/((g^2-c)^2)(g^2+f^2-c) (b) (4c h^2)/((f^2-c)^2)(g^2+f^2-c) (c) (4c h^2)/((f^2-f^2)^2)(g^2+f^2-c) (d) none of these