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40 votes
40 votes
Find the value of y. Round your answer to the nearest tenth.

COS yº= 8/13
A) 31.6
B) 38.0
C) 45.8
D) 52.0

Find the value of y. Round your answer to the nearest tenth. COS yº= 8/13 A) 31.6 B-example-1
User Milo Wielondek
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1 Answer

24 votes
24 votes
Is a calculator allowed? 8/13 = 0.61538. Then take arccos of that to get 52 degrees. Arccos on a calculator might be seen as acos or inv-cos.
User Morteza Kavakebi
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2.6k points