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Thread: Trigonometry. Reference angles

  1. January 3rd 2010, 08:15 AM #1
    jeunesse27
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    Trigonometry. Reference angles

    Happy new year to you all!
    I would greatly appreciate your help with these angles!
    Thank you!
    Find the reference angle R (theta) if (theta) equals to 6.
    a. 18.725033
    b. 21.325033
    c. 16.225033
    d. 19.225033
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  2. January 3rd 2010, 08:56 AM #2
    skeeter
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    Quote Originally Posted by jeunesse27 View Post
    Happy new year to you all!
    I would greatly appreciate your help with these angles!
    Thank you!
    Find the reference angle R (theta) if (theta) equals to 6.
    a. 18.725033
    b. 21.325033
    c. 16.225033
    d. 19.225033
    Looks like the question is "mixing" radians with degrees.

    I assume \theta = 6 is in radians, and the given answer choices are in degrees.

    are you leaving that information out of the directions?
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  3. January 3rd 2010, 09:28 AM #3
    jeunesse27
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    I was utterly confused myself, though I did copy the question fully from the book.
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  4. January 3rd 2010, 10:27 AM #4
    skeeter
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    reference angle is in quadrant IV and equals 2\pi - 6

    now convert the radian angle 2\pi - 6 into degrees.
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