Question
Asked Nov 25, 2019
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Find the indicated angle or side. Give an exact answer.

Find the measure of angle A in degrees.

В.
213
2
с
А
6
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В. 213 2 с А 6

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Expert Answer

Step 1

Given:

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a 213, b 6 and c = 2

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Step 2

By law of cos...

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b2c2-a cos A 2bc 63+2-(213) 2(6)(2) 36+4 4(13) 24 -12 24

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