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JEE Advanced Mathematics question

MathematicsStraight LinesJEE Advanced

ABC is an isosceles triangle in which A is , , and AB is along the -axis. If then the equation of the line BC is

Answer: (A)

Solution

The base angles are each. Drop the perpendicular from to ; it bisects , so . Taking on the positive side: and (C above the axis,

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Question ID VK-108788