de Moivre's theorem
/dəˈmwɑːvrə/- Mathematics a theorem which states that (cosθ + i sinθ)n = cos n θ+ i sin n θ, where i is the square root of -1.【数】棣美弗定理。
词源
early 18th cent.: named after Abraham de Moivre （1667-1754） French-born mathematician， fellow of the Royal Society.