J1ea1loSugsaCarlina J1ea1loSugsaCarlina

21-06-2016
Mathematics

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Which of following is a key element in the proof of the law of cosines

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02-07-2016

In proving using the law of cosines, you need to consider these two key elements. The first element is a^2 + b^2 - 2abcosC and the second one is cosine^2 theta + sin^2 theta is equal to 1. Law of Cosines is derived from the Pythagorean Theorem

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