18pateljas 18pateljas

22-02-2017
Mathematics

contestada

(cosx-sinx)^2 = 1-2sinx cosx

Respuesta :

22-02-2017

cos^2x - 2cosxcosx + sin^2x = 1 - 2sin x cosx

So cos^2x + sin^2x = 1

Answer Link

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