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Question

# Use the Law of Cosines to solve the triangle. $B=48^{\circ}, \quad a=18, \quad c=12$

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To solve the triangle, use the Law of cosine and the property of sum of interior angles of triangle given by:

$b^2=a^2+c^2-2ac\cos B$

$A+B+C=180^{\circ}$

Perform series of operation applicable and simplify.

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