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

যদি 2sinθ - 8cos2θ + 5 = 0, যেখানে 0° < θ < 90°; tan 2θ + cosec 2θ এর মান নির্ণয় করুন।

1
5/√3
2
5/3
3
4/√3
4
7/√3
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