defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

यदि 2 cos2 θ – 5 cos θ + 2 = 0 है, और 0° < θ < 90° है, तो θ का मान क्या होगा?

1
45°
2
60°
3
90°
4
30°
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