precalculus math solve for x

Question

2 cos x + 1 = 2 , 0 degrees ≤  x < 360 degrees

Answer 1

Grace,

You should always try to isolate the trig function in your equation first (if possible)

2 cos x + 1 = 2

cos x = 1/2

Then consult with your unit circle, to find answers in the 1st and 4th quadrant: x=60 degrees and

x=300 degrees