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

જો 0 < θ ≤ 90° હોય, તો 'θ' માટે ઉકેલ શોધો જ્યાં cos2 θ - 3 cos θ + 2 = 2 sin2θ.

1
30°
2
45°
3
90°
4
60°
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