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

यदि cos A = 15/17 और cos B = 4/5 है, तो cot(A - B) का मान ज्ञात कीजिए।

1
87/99
2
88/97
3
85/13
4
(- 84)/13
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