addition theorem

noun

Definition of addition theorem

: a formula or rule that expresses algebraically a function of the sum of two arguments in terms of the same or related functions of the separate arguments [as sin (x + y) = sin x cos y + sin y cos x]

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First Known Use of addition theorem

1875, in the meaning defined above

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Time Traveler for addition theorem

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The first known use of addition theorem was in 1875

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Dictionary Entries Near addition theorem

addition rule

addition theorem

additive

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Cite this Entry

“Addition theorem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/addition%20theorem. Accessed 18 Sep. 2021.

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