contestada

Which of the following is equivalent to

2 cos²(x) - cos(2x) ?

a. sin(2x)
b. sin²(x)
c. 1
d. 2

Respuesta :

smayra1191

Answer:

Option c ) 1

Step-by-step explanation:

[ Refer to the attachment ]

  • Sin²x + Cos²x = 1

Cos²x = 1 - Sin²x

  • Cos2x = 1 - 2Sin²x

Ver imagen smayra1191

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