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Math Help - Radians

  1. #1
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    Question Radians

    Suppose an ant walks counterclockwise on the unit circle from the point (-1,0) to the endpoint of the radius that forms an angle of 5.8 radians with the positive horizontal axis. How far has the ant walked? Give exact answer in terms of 'pi'

    The distance walked by the ant is: ?
    Last edited by jonathanraxa; March 28th 2012 at 05:53 PM.
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  2. #2
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    Re: Radians

    Quote Originally Posted by jonathanraxa View Post
    Suppose an ant walks counterclockwise on the unit circle from the point to the endpoint of the radius that forms an angle of 5.8 radians with the positive horizontal axis. How far has the ant walked? Give exact answer in terms of
    The distance walked by the ant is: ?
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  3. #3
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    Re: Radians

    5.8 radians takes you into the 4th quadrant. So arc joining start point to end point makes angle of 5.8-pi at the centre. Since radius=1 arc length=5.8-pi
    Thanks from jonathanraxa
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  4. #4
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    Re: Radians

    If you have been asked to do this problem, whoever gave it to you expects you to know how "radian" measure is defined. Please tell us what you do know and show us what you have done on this problem.
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