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MHT CET Mathematics question

MathematicsStraight LinesMHT CET

The length of the perpendicular from the origin to a lines is and the line makes an angle of with the positive direction of Y-axis. Then, the equation of the line is

Answer: (A)

Solution

Write the line as with normal at angle ; the direction vector of the line is . Its angle with the positive Y-axis is , so

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Question ID VK-027353