railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
যদি sinA + cosecA = 2 হয়, তাহলে cot(A - 15°) এর মান কত?
1
(√5 - 1)/(√5 + 1)
2
(√7 - 1)/(√7 + 1)
3
(√3 + 1)/(√3 - 1)
4
(√3 - 1)/(√3 + 1)