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Analytical Geometry

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22 Aug 2010 08:15:07 IST

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Is x axis and y axis is perpendicular or not because we know condition of perpendicular is m1m2=-1 b

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Is x axis and y axis is perpendicular or not because we know condition of perpendicular is m1m2=-1 but we know slope of x axis is 0 and y is infinite therefore who wiil prove that 0*infinite=-1

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Deepak Aggarwal

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Joined: 9 May 2009

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22 Aug 2010 12:21:48 IST

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Two lines are perpendicular if the product of their slopes is -1 or one has a slope of 0 (a horizontal line) and the other has an undefined slope (a vertical line).

Refer: http://en.wikipedia.org/wiki/Slope

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27 Aug 2010 22:09:27 IST

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infinity has the power to convert 0 to any real no so u can never say that 0*infinity is -1 ......... 2 lines r perplr if the prod of thier slopes is-1........for convinience u can say that x and y axes are defined the way they are i.e perpendicular

jay

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7 Sep 2010 11:25:32 IST

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What is slop? It is basically the angle made by the line WITH X-AXIS. So slop is a relative to x axis assuming thot x axis is some horizontal line. So we consider y axis perpendicular w.r.t x-axis. So x n y are perpendicular to each other.

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