defence exam DGAFMS Group C 2025 Mock Test Series Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

যদি sec 4A = cosec (3A - 50°), যেখানে 4A এবং 3A সূক্ষ্মকোণ, তাহলে cosec (A + 25°) এর মান নির্ণয় করো।

1
0
2
1/√2
3
1
4
√2
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