railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

যদি sinx = cosx, এবং x হল সূক্ষ্মকোণ, 2sin2x - 3cos2x এর মান হল:

1
1/2
2
1
3
-1
4
-1/2
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