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

2sin2x - 1 = 0 எனில், xஐக் காண்க. 

1
\(\pi \over 4\)
2
\(\pi \over 2\)
3
0
4
π 
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