MartynBH MartynBH

10-06-2016
Mathematics

contestada

sin^2(x)-cos^2(x)=0
Find all the solutions in the interval [0,2pi)
Plz help.

Respuesta :

10-06-2016

Hello,
as sin² x -cos² x=cos 2x
The equation is
cos 2x=0
==>2x=π/2+kπ
==>x=π/4+kπ/2 with k integer

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