A= "x"
C = 30"\\degree"
B= 120"\\degree"
A = 180"\\degree" - 30"\\degree" - 120"\\degree"
A = 30"\\degree"
"\\frac{sinA}{5miles}" = "\\frac{sinB}{b}"
"\\frac{sin30}{5miles}" = "\\frac{sin120}{b}"
"\\frac{1\/2}{5miles}" = "\\frac{\\sqrt3\/2}{b}"
1/2 ( b )= "\\sqrt3\/2" (5miles)
b = 5 "\\sqrt3" miles
the ship sails to find the lighthouse due south is 5"\\sqrt3" miles
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