equals 73 19' 27". Find side a.

Now combine the different parts of the equation.

a2 =b2 + c2 -2 be cos A

a2 = (9574.62 + 11376.36) -5989.63 = 14961.35

When solving for the remaining two unknown angles of the triangle and two sides and the included

angle are known, it is best to use the tangent law in the solution.

angle B equals 41 17' 32". Find angle A and angle C.

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