October 2018 1 40 Report
Mohon dibantu>< himpunan penyelesaian dari persamaan 4cos²x - 3 = 0, untuk interval 0°
≤x≤180° adalah...
a. {60°, 150°}
b. {30°, 240°}
c. {30°, 150°}
d. {150°, 240°}
e. {60°, 240°}

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