Law of cosines?

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Law of cosines?

Guest Apr 18, 2014

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If a triangle has sides of length a, b and c and the angle opposite side a is A then the law of cosines says

a² = b² + c² - 2*b*c*cos(A)

Alan Apr 18, 2014

Alan · Answer 1 · 2014-04-18T07:57:06

If a triangle has sides of length a, b and c and the angle opposite side a is A then the law of cosines says

a² = b² + c² - 2*b*c*cos(A)