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

sin (45° + x) + sin (45° - x) = 

1
 √3 cos x 
2
√3 sin x 
3
 √2 cos x 
4
 √3 cot x 
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