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

କ’ଣ (1 + ଖଟ x - କୋସେକ x) (1 + ଟାନ x + ସେକେଣ୍ଡ x) ସମାନ?

1
1
2
2
3
sin x
4
cos x
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