Share this entry

de Moivre's theorem Syllabification: de Moi·vre's the·o·rem
Pronunciation: /də ˈmwävrəz ˌTHirəm/

Definition of de Moivre's theorem in English:

A theorem that states that (cos θ + i sin θ)n = cos nθ + i sin nθ, where i is the square root of 1.
Example sentences
  • The de Moivre's theorem is used very often in electrical engineering and physics to determine things like the phase shifts of alternating currents.


Early 18th century: named after Abraham de Moivre (1667–1754) French-born English mathematician, fellow of the Royal Society.

Definition of de Moivre's theorem in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day exemplum
Pronunciation: ɪɡˈzɛmpləm
an example or model...