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A line has intercepts a and b on the coordinate axes. When the axes are rotated through an angle α in anticlockwise direction, keeping the origin fixed, the line makes equal intercepts on the coordinate axes. Then the value of cotα is

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A line has intercepts a and b on the coordinate axes. When the axes are rotated through an angle α in anticlockwise direction, keeping the origin fixed, the line makes equal intercepts on the coordinate axes. Then the value of cotα is



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