defence exam Agniveer Army GD Mock Test Series 2025 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

ΔDEF হল E কোণে সমকোণী। যদি cosD = 8/17, তাহলে sec F এর মান কত হবে?

1
17/8
2
8/17
3
17/15
4
15/17
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