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16 March, 15:38

Law of cosines finding angle

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  1. 16 March, 16:00
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    The law of cosines is:

    a^2=b^2+c^2-2bc*cosA where a, b, c are side lengths and A is the angle opposite the side on the other side of the equal sign ... so

    A=arccos (a^2-b^2-c^2) / (2bc)
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