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Unformatted text preview: 8.3 The Law of Cosines Cam 3: TWO Sidﬁiﬁ and the included angle are kmwn (SAS).
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_ 2 4. A p ane eaves airport A and travels 690 miles to airport
B on a bearing ofN42°E.The plane later leaves airport B
and travels to airport C 525 miles away on a bearing of Ser. Find the distance from airport A to airport C to the
nearest mile. I 13 A ITIOIOI‘iZBd sallbeat leaves Naples. Florida. bound for Key West. 150 miles: away.
Maintaining a constant speed of ’15 miles per hour, but encountering heavy crosswith
and strong currents. the crew finds, after 4 1101113. that the sailboat is off C(IJLITSC by 20"“.
(a) How far is the sailboat from Key West at. this time? (b) Through what angle should the sailboat turn to correct its course? (Cl HOW much time has been added to the trip because of this? ( Assume that lhc
speed remains at 15 miles per hour.) : CH3~5+€3 3 ﬂ ‘ ' I magl—
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 Fall '11
 BlisinHestiyas

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