railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
যদি \(\frac{cosec \theta+cot \theta}{cosec \theta -cot \theta}=7\) হয়, তাহলে \(\frac{4sin^2\theta + 5}{4sin^2\theta-1}\) এর মান কত?
1
12
2
3
3
15
4
9