Question

Me ayudan a resolver porfavor
Sen 2x + cos2 x = 1

Answer 1

1-cos²x-cos²x=1/2

-2cos²x=1/2-1

-2cos²x=-1/2

cos²x=-1/2:(-2)

cos²x=1/4

cosx=V1/4

x=arcocos-√/1/4

x=60