Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Quantitative Aptitude Trigonometry Circular Measure of Angles

যদি sin2β - sin30° = 0 এবং β একটি তীক্ষ্ণ কোণ হয়, তাহলে β এর মান নির্ণয় করো।

1
60°
2
90°
3
45°
4
0°
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