Cosine Law Help Please?

  • Thread starter Thread starter Dsg D
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Dsg D

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I need the step-by-step calculations please, thanks.

1. Solve each triangle.

(a) Triangle ABC: <A=62 degrees, b=62 m, c= 73m
(b) Triangle XYZ: x=123 m, y=108 m, z=92 m

2. A parallelogram has sides 12 cm and 18 cm and a contained angle of 78 degrees. Find the shorter diagonal.
 
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