Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Quantitative Aptitude Trigonometry

यदि sec 4A = cosec (A - 20°), जहाँ 4A एक न्यून कोण है, तो A का मान क्या है?

1
24°
2
20°
3
22°
4
21°
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