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March 29, 2017

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All solutions in interval [0,2pi) of cosine theta plus one equals zero

  • trig - ,

    lets set theta = x
    cos x + 1 = 0
    lets solve for x
    cos x = -1
    x = arccos -1 arccos is inverse of cos.
    Now what values would make cos -1?
    Answer: 180 degrees.

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