Question: A triangular machine part has sides of 5 cm and 8 cm. Explain why the law of sines, or the law of cosines, is used

A triangular machine part has sides of 5 cm and 8 cm. Explain why the law of sines, or the law of cosines, is used to start the solution of the triangle if the third known part is

(a) The third side,

(b) The angle opposite the 5-cm side, or

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