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11 March, 16:22

Solve the triangle.

B = 72°, b = 12, c = 8

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Answers (1)
  1. 11 March, 19:16
    0
    The answer is 12^2=x^2+8^2-16x (cos (72°)

    x^2-4.9443x=80

    (x-2.4721) ^2=86.1115

    x-2.4721=±9.2796

    x=11.7517

    B=72°, b=12, c=8, a=11.8

    C=arcsin (8/12*sin (72°)) = 39.3°

    A=68.7°
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