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20 December, 10:34

Solve the triangle. B=36 a=41 c=20

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  1. 20 December, 11:02
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    Use cosine rule:-

    b^2 = 41^2 + 20^2 - 2*20*41*cos 36

    = 754.21

    b = 27.5

    you can now find angle A using the sine rule

    27.5 / sin 36 = 41 / sin A

    sin A = 0.87633

    < A = 61.2 degrees
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