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

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.

briensmarandache · Answer

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

briensmarandache · Answer

what is wrong with my work? the ans is 180

briensmarandache · Answer

@SolomonZelman  what is wring with my work

briensmarandache · Answer

wrong

briensmarandache · Answer

@DUDE..IM..A..DUCK

briensmarandache · Answer

@adamaero