Solve Applied Problems Using the Law of Cosines
-A Plane $31.7 ^ { \circ }$

question 246

Multiple Choice

Solve Applied Problems Using the Law of Cosines
-A plane flying a straight course observes a mountain at a bearing of $31.7 ^ { \circ }$ to the right of its course. At that time the plane is 8 kilometers from the mountain. A short time later, the bearing to the mountain becomes $41.7 ^ { \circ }$ . How far is the plane from the mountain when the second bearing is taken (to the nearest tenth of a $\mathrm { km } ) ?$

• A) \(6.3\) kilometers
• B) \(10.1\) kilometers
• C) \(11.4\) kilometers
• D) \(4.2\) kilometers

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