Respuesta :

Answer:

sin 30 = cos 2x

cos60 = cos 2x ( sin(90 - 60) = cos60)

2x = 60

x = 30

Answer:

30°

Step-by-step explanation:

sin 30º = cos(2x)

sin 30º = cos (90°-30°)

⇒2x=60° ⇒ x=30°