railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Circular Measure of Angles

সমকোণী ত্রিভুজ ABC তে, যদি ∠A = 30° হয়, তাহলে 3 sin A - 4 sin3A এর মান নির্ণয় করো।

1
2
2
-1
3
-2
4
1
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