railway RRB Group D Mock Test Series 2024-25 Quantitative Aptitude Trigonometry Circular Measure of Angles

যদি A + B = 36° এবং A – B = 15° হয়, তাহলে sin2(A2 – B2) এর মান নির্ণয় করুন। 

1
-1/√2
2
-1
3
0
4
1
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