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Thread: Help with problem involving terminal angles?

  1. #1
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    Help with problem involving terminal angles?

    Hello everyone. Our professor explained to us how to get the terminal angles of a unit circle. In this particular question though (see attached picture), I don't know how to solve the terminal angle without any angle measure given... Please guide me in the right direction.

    Thank you very much!
    Attached Thumbnails Attached Thumbnails Help with problem involving terminal angles?-ps3a1.jpg  
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  2. #2
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    Re: Help with problem involving terminal angles?

    Quote Originally Posted by kaonashi View Post
    Hello everyone. Our professor explained to us how to get the terminal angles of a unit circle. In this particular question though (see attached picture), I don't know how to solve the terminal angle without any angle measure given... Please guide me in the right direction.
    It appears that your professor and/or your text material has particular meaning for "terminal point".
    Please tell us what it means.

    Any of the given points can be on the terminal ray of an angle.
    a & c are in the second quadrant, the other two are in the first. Does the make a difference?
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  3. #3
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    Re: Help with problem involving terminal angles?

    It looks the terminal point has to lie on the unit circle, so just one of them fits.
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  4. #4
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    Re: Help with problem involving terminal angles?

    The unit circle. If (x, y) is on the unit circle, what must be true of $\displaystyle x^2+ y^2$?
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