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$Old$ 11-19-2008, 06:56 PM

monkius $monkius is offline$

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$Post$ Angles between lines

Find the angle between x=2+3t, y= -1-t and x+3y=0
Been having trouble with this one, part of extra work.
thanks for the help

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$Old$ 11-19-2008, 07:08 PM

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Originally Posted by monkius $View Post$

Find the angle between x=2+3t, y= -1-t and x+3y=0
Been having trouble with this one, part of extra work.
thanks for the help

solving the y equaiton for t you get

$y=-1-t \iff t=-1-y$ then sub this into the equation for y to get

$x=2+3(-1-y) \iff x=-1-3y$

try putting both equations into standard form and what do you notice?

Good luck.

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