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direction cosines MAT.

law of cosines MAT.

Przykłady jednojęzyczne (niezredagowane i niesprawdzone przez PONS)

angielski
The law of cosines can be used to determine a side of a triangle if two sides and the angle between them are known.
en.wikipedia.org
Because of time reversal symmetry, only even powers of the cosines are allowed.
en.wikipedia.org
Figure 7a shows a heptagon cut into smaller pieces (in two different ways) to yield a proof of the law of cosines.
en.wikipedia.org

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