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

যদি Tan4A - Tan2A = 1 হয়, তাহলে Sec2A - SecA এর মান কত?

1
1
2
0
3
2
4
এগুলির কোনওটি নয় 
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