Question 813430
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Hi
law of sines:
{{{a/sin(alpha)}}}{{{""=""}}}{{{b/sin(beta)}}}{{{""=""}}}{{{c/sin(gamma)}}}
Using the first two expressions:
{{{a/sin(alpha)}}}{{{""=""}}}{{{b/sin(beta)}}}
{{{x/sin("40°")}}}{{{""=""}}}{{{115/sin("87°")}}}
Cross-multiply:
115·sin(40°) = x·sin(87°)
  x= 115·sin(40°)/sin(87°)
Repeat process for third side