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What is the angle between the lines `x+y=1` and `x-y=1` ?A. `pi/6`B. `pi/4`C. `pi/3`D. `pi/2` |
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Answer» Correct Answer - D Slope of `x+y=1` is -1 Slope of `x-y=1` is 1 Let `tan A=-1, tan B=1` `A=(3pi)/4, B=pi/4` `A-B=pi/2` |
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