December 2018 1 6 Report
Himpunan penyelesaian dari persamaan cos 2x + 3 sin x + 1 = 0
Untuk 0 ≤ x ≤ 360° adalah ...
A. {30°,150°}
B. {60°, 120°}
C. {120°, 240°}
D. {210°, 330°}
E. {240°, 300°}
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