1. Law of cosinesIn trigonometry, the law of cosines (also known as the cosine formula or cosine rule) relates the lengths of the sides of a plane triangle to the cosine of one of its angles. Using notation as in Fig. 1, the law of cosines says where γ denotes the angle contained between sides of lengths a and b and opposite the side of length c. Some schools also describe the notation as follows: Where C represents the same as γ and the rest of the parameters are the same.
Read “Law of cosines” on English Wikipedia
Read “余弦定理” on Japanese Wikipedia
Read “Law of cosines” on DBpedia
Read “Law of cosines” on English Wikipedia
Read “余弦定理” on Japanese Wikipedia
Read “Law of cosines” on DBpedia
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