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26 December, 12:25

Given: ΔABC; a = 10; b = 4, and c = 11. Find the measurement of ∠B to the nearest tenth of a degree.

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  1. 26 December, 15:25
    0
    Use the Cosine Rule to find this

    cos
    = [ 4^2 - 10^2 - 11^2] / - 2*10*11

    = 0.93182

    so m < B = 21.3 degrees to nearest tenth. Answer
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