1.- Si se cumple: Sen(x+20°)=Cos(2x+10) Calcule: Cos3x.... Question from @mariapali43324

July 2023 1 2 Report

1.- Si se cumple: Sen(x+20°)=Cos(2x+10) Calcule: Cos3x

Respuesta:

sen(2x+10°)=cos(x+20°) Entonces quiere decir que 2x + 10 + x + 20 = 90

3x = 60 -----> x = 20

Sen 3x = sen 60

Cos 6 x = cos 120

√3 / - 0,5 Rpta = -2√3

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