If sinx=−1/2, and 270°<x<360°, what is cos(x−30°)?

Question

If sin x=−1/2, and 270°<x<360°, what is cos(x−30°) in fractional form?

Answer 1

If sinx=−1/2, and 270°<x<360°, what is cos(x−30°)?

If Sin(x) = -1/2, x = -30° or +330°. Then Cos(330-30) = Cos(300) = 1/2