railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

0 < θ ≤ 90° असल्यास, 'θ' साठी सोडवा जेथे cos 2 θ – 3 cos θ + 2 = 2 sin 2 θ.

1
30°
2
४५°
3
90°
4
६०°
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