7. Non-Right Triangles
Law of Sines
Problem 7.38
Textbook Question
Textbook QuestionStanding on one bank of a river flowing north, Mark notices a tree on the opposite bank at a bearing of 115.45°. Lisa is on the same bank as Mark, but 428.3 m away. She notices that the bearing of the tree is 45.47°. The two banks are parallel. What is the distance across the river?
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