Respuesta :

Answer:

D. 270°

Step-by-step explanation:

The equation can be factored as ...

... (2sin(x) -1)(sin(x) +1) = 0

Then solutions are ...

... sin(x) = 1/2 . . . . x = 30°, 150° . . . . these values make the first factor 0

... sin(x) = -1 . . . . . x = 270° . . . . . . . this value makes the second factor 0

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