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The law of cosine is c2 = a2 + b2 – 2ab cos C. find the value of 2ab cos C

The law of cosine is c2 = a2 + b2 – 2ab cos C. find the value of 2ab cos C
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The law of cosine is c2 = a2 + b2 – 2ab cos C. find the value of 2ab cos C

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User Punam
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2 Answers

4 votes
add 2ab cos C to both sides of the '=':-

c2 + 2ab cos C = a2 + b2

now subtract c2 from both sides:-

2ab cos C = a2 + b2 - c2
answered
User Gaohomway
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8.7k points
7 votes

Answer: 37

Explanation:

answered
User Qollin
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8.0k points
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