April 2019 2 7 Report
Diketahui persamaan √2 cos x - 1 = 0 untuk 0° ≤ x ≤ 360°. Himpunan penyelesaian dari persamaan tersebut
a. 45°, 135°
b. 45°, 225°
c. 45°, 315°
d. 45°
e. 45°, 135°, 225°, 315°

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