June 2019 1 10 Report
Himpunan penyelesaian dari persamaan cos 4x + 3 sin 2x = -1 untuk 0°≤ x ≤ 180° adalah...
a. {120°, 150°}
b. {150°, 165°}
c. {30°, 150°}
d. {30°, 165°}
e. {15°, 105°}

*pakai cara ya...
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