a ship at sea is 92 miles from one radio tower and 124 miles from another. The angle between the radio signals has a measure of 156 degrees. Find the distance between the radio towers.
Solve with the law of cosines:
a^2 = b^2+c^2-2*b*c*cos(A)
a^2 = 92^2+124^2-2*92*124*cos(156)
a^2 = 45,589.69
a = 213.52 miles
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