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A line has intercepls a and b on the coordinate axes. When the axes are rotated an angle `alpha` Keeping the origin fixed. The line makes equal intercepts on the coordinate axes, then `tan alpha`=

A

`(a+b)/(a-b)`

B

`(a-b)/(a+b)`

C

`a^2-b^2`

D

`a^2+b^2`

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The correct Answer is:
B
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