Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

যদি 3 sin2θ + 7 cos2θ = 6 এবং 0 < θ ≤ 90° হয়, তাহলে θ-এর মান কত?

1
30°
2
90°
3
60°
4
45°

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