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Find one positive and one negative angle coterminal with an angle of 9pi/6

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  1. 2 June, 23:33
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    21pi/6 and - 3pi/6.

    Step-by-step explanation:

    We add or subtract 2pi from the angle:

    9pi/6 + 2 pi

    = 9pi/6 + 12pi/6

    = 21pi/6 is the positive angle

    9pi/6 - 2pi

    = 9pi/6 - 12pi/6

    = - 3pi/6.
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