canela2 canela2
  • 25-03-2017
  • Mathematics
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Law of cosines finding angle

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irspow
irspow irspow
  • 25-03-2017
The law of cosines is:

a^2=b^2+c^2-2bc*cosA  where a,b,c are side lengths and A is the angle opposite the side on the other side of the equal sign...so

A=arccos(a^2-b^2-c^2)/(2bc)
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