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Math Help - Slope of the line

  1. #1
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    Slope of the line

    ,
    Q) Find the slope of the line which makes an angle of 60 degrees with the positive direction of Y - Axis.

    My answer is: negative sqrt of 3
    The text book answer is: negative 1/sqrt of 3

    What might be the reason?
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  2. #2
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    Quote Originally Posted by saberteeth View Post
    ,
    Q) Find the slope of the line which makes an angle of 60 degrees with the positive direction of Y - Axis.

    My answer is: negative sqrt of 3
    The text book answer is: negative 1/sqrt of 3

    What might be the reason?
    It makes an angle of 30 degrees with the negative x-axis, that is, an angle of \theta = 150^0 with the positive x-axis. And m = \tan \theta ....
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  3. #3
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    Quote Originally Posted by mr fantastic View Post
    It makes an angle of 30 degrees with the negative x-axis, that is, an angle of \theta = 150^0 with the positive x-axis. And m = \tan \theta ....
    Thanks!
    Last edited by saberteeth; September 10th 2009 at 05:06 AM. Reason: stupid question..(now changed :D)
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