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8 December, 08:21

What degree measure is equivalent to - 4pie over 9

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  1. 8 December, 10:50
    0
    Anyway

    2pi radians=360

    so

    -4pi/9radians=xdegrees

    2pi/360=-4pi/9r/x

    times both sides by 360x

    2xpi=-1440pi/9

    2xpi=-160pi

    divide both sides by 2pi

    x=-80

    80 degres
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