audawnt audawnt

13-02-2020
Mathematics

contestada

Cos(2x)cos(x)+sin(2x)sin(x)=1

Respuesta :

melkemk503 melkemk503

13-02-2020

Answer:

=cos(x) use basic properties of sosine (addition and subtraction) cos(a-b)=cos(a)cos(b)+sin(a)sin(b)

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