The line passing through the points $(3, -4)$ and $(-2, 6)$ and the line passing through $(-3, 6)$ and $(9, -18)$ are:
- APerpendicular
- BParallel
- CMaking an angle of $60^\circ$ with each other
- DNone of these
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DifficultJEE MAIN 2015
View SolutionThe angle between the straight lines $3x + 4y + 9 = 0$ and $x - 7y - 22 = 0$ is
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