railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

2cos2A + 1 = 2sin3A மற்றும் A + B = 90°, எனில் cosB இன் மதிப்பு ? 

1
1/2
2
1
3
0
4
1/√2
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