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Find Y. Round to the nearest tenth.

Find Y. Round to the nearest tenth.-example-1
User Wilsontgh
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4 votes

Answer:

Explanation:

The Law of Cosines applying here is c^2 = a^2 + b^2 - 2ab*cos C.

Here c = 8 ft, b = 16 ft and a = 17 ft. Plugging these values into the above equation yields

8^2 = 17^2 + 16^2 - 2(17)(16)cos A, or

64 = 289 + 256 - 544*cos A, or

-481 = -544*cos A

Dividing both sides by -544 yields: cos A = 0.884

Using the inverse cosine function on a calculator, we get A = Y = 0.486 radians, or 27.8 degrees

User Wille Esteche
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