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4 March, 08:46

Law of cosine find m

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  1. 4 March, 11:28
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    Cos (B) = (a^2 + c^2 - b^2) / (2 * a * c)

    cos (B) = (11^2 + 17^2 - 12^2) / (2 * 11 * 17)

    cos (B) = (121 + 289 - 144) / (374)

    cos (B) = 266 / 374

    cos (B) = 0.7112299465

    Angle B = 44.665 degrees
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