Arturo O. answered • 02/02/20
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sin(x) = -1/2
Given that x is in quadrant IV,
x = 330°
cos(x - 30°) = cos(330° - 30°) = cos(300°) = 1/2
Judite S.
asked • 02/02/20If sinx=−1/2, and 270°<x<360°, what is cos(x−30°)?
Help me please........ trigonometry
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