Straight LineHard
Question
If the equation x2 + y2 + 2gx + 2fy + 1 = 0represents a pair of lines, then -
Options
A.f2 + g2 =1
B.g2 − f2 =1
C.f2 − g2 = 1
D.f2 + g2 = 1/2
More Straight Line Questions
The x-coordinate of the incentre of the triangle that has the coordinates of mid points of its sides as (0, 1)(1, 1) and...Two lines L1: X = 5, and are coplanar. Then can take value(s)...The equations of the lines on which the perpendiculars from the origin make 30o angle with x-axis and which form a trian...A straight line cuts the x-axis at point A(1, 0) and y-axis at point B, such that ∠OAB = α(α > ), C is t...If the straight lines are coplanar, then the plane(s) containing these two lines is(are)...