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The figure below is not drawn to scale.
MathF4OPP1Q15
Find correct to 1 decimal place;

  1. Length PQ. 
  2. Angle ABC 

1 Answer

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  1.  7.62 + 4.82 – 2 x 7.6 x 4.8 cos 80
    = 57.76 + 23.04 – 12.67
    = 68.13 
    R = 68.13
    = 8.3
  2. Sin B/4.8 = Sin 80/8.254
    Sin B = 0.5727
    B = sin -10.5727
    = 34.9°
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