state gov Assam (অসম) ADRE Grade III Mock Test Series 2025 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

यदि 3cos2 A + 7sin2 A = 3, 0° ≤ A ≤ 90° है, तब A का मान है:

1
90°
2
45°
3
0°
4
30°
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