AP Precalculusmediummcq1 pt
Solving cos x = −1/2 on [0, 2π) gives
A.2π/3 and 4π/3
B.π/3 and 5π/3
C.2π/3 only
D.no solution
Explanation
Core Concept
Cosine is negative in quadrants II and III.
Correct Answer
A2π/3 and 4π/3
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