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If angle lies in second Quadrant?

  1. Aug 24, 2009 #1
    If angle lies in second Quadrant??

    Hey fellows I want to know that if angle lies in second quadrant but how,,, if it lies then some of its portion is in first quadrant and it would make this angle greater than 90 degress.
     
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  3. Aug 24, 2009 #2

    ideasrule

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    Re: If angle lies in second Quadrant??

    Yes, angles in the second quadrant are greater than 90 degrees. Why is that a problem?
     
  4. Aug 24, 2009 #3

    kuruman

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    Re: If angle lies in second Quadrant??

    That is correct, the angle is greater than 90 but less than 180 degrees.
     
  5. Aug 24, 2009 #4
    Re: If angle lies in second Quadrant??

    It is written in my bookthat if angle is in second quadrant then a point (x,y) on its terminal side has negative x cordinate and positive y cordinate ???:confused:
     
  6. Aug 24, 2009 #5
    Re: If angle lies in second Quadrant??

    The vertical axis (y-axis) is considered to be x = 0 (in the cartesian plane). Therefore, any point (x,y) in the second quadrant will have a negative x value and a positive y value.

    Consult this link here if you require more information: http://en.wikipedia.org/wiki/Cartesian_coordinate_system
     
  7. Aug 24, 2009 #6

    tiny-tim

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    Hi HussanAli! :wink:

    I think you're confusing two different meanings of the word "angle" …

    when we say "the angle lies in second quadrant", we mean that the "terminal side" of the angle does …

    but of course, as you say, the "whole" angle also includes the first quadrant.

    It's standard English to use the first meaning. :smile:
     
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