railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

যদি sin x = cos 40°.sin 50° + sin 40°.cos 50° হয়, তাহলে x এর মান কত হবে?

1
45 ডিগ্রী
2
90 ডিগ্রী
3
30 ডিগ্রী
4
0 ডিগ্রী
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