At midnight, two Coast Guard helicopters set out from San Francisco to find a sailboat in distress. Helicopter A flies due west over the Pacific Ocean at 250 km/hr, and helicopter B flies northwest at 210 km/hr. At 1 A.M., helicopter A spots a flare from the boat and radios helicopter B to come and assist in the rescue. How far is helicopter B from helicopter A at this time? Compute the answer to two significant digits.

Question

briensmarandache · Answer

a=Sqt(210^2 * 250^2 -2*210*250*cos(sec(210/250)) using the law of cosines