law of sines

Definition of law of sines

1 : a law in trigonometry: the ratio of each side of a plane triangle to the sine of the opposite angle is the same for all three sides and angles
2 : a law in trigonometry: the ratio of the sine of each arc of a spherical triangle to the sine of the opposite angle is the same for all three arcs and angles

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Cite this Entry

“Law of sines.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/law%20of%20sines. Accessed 3 Dec. 2021.

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