Class 11MathematicsPair of straight linesAngle between the pair of straight lines, Condition for parallel and perpendicular lines
EasyWhich of the following equations represents a pair of perpendicular straight lines?
- A$y^2 + xy - x^2 = 0$
- B$y^2 - xy + x^2 = 0$
- C$x^2 + xy + y^2 = 0$
- D$x^2 + xy - 2y^2 = 0$
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