Slution: Solve for angle A in the spherical triangle ABC

Solve for angle A in the spherical triangle ABC, given a = 106º25’, c = 42º16’ and B = 114º53’. How to compute using law of cosines for sides?

Solve for angle A in the spherical triangle ABC

Problem Statement:

Solve for angle A in the spherical triangle ABC, given a = 106º25’, c = 42º16’ and B = 114º53’.
  • A. 45º54’
  • B. 80º42’
  • C. 97º09’
  • D. 72º43’

Problem Answer:

The angle A in the given spherical triangle ABC is 97º09’.

Solution:

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