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Please help I dont understand
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11 votes
Please help I dont understand

Please help I dont understand-example-1
User Anbazhagan P
by
3.2k points

1 Answer

11 votes

Answer:

38 degrees

Explanation:

By the Law of Cosines,

5² = 3² + 7² - 2(3)(7) cos A

5² - 3² - 7² = -2(3)(7) cos A

-33 = -42 cos A

cos A = 33/42

A = arccos(33/42), which is about 38 degrees.

Please help I dont understand-example-1
User Elie Eid
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3.5k points
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