rahem61 rahem61
  • 01-07-2017
  • Mathematics
contestada

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

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Аноним Аноним
  • 01-07-2017
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
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cawinterf cawinterf
  • 06-12-2020

Answer: 37

Step-by-step explanation:

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