railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

यदि cot A = [sin B/(1 – cos B)] है, तो cot 2A का मान क्या है?

1
cot(B/2)
2
cot 2B
3
cot B
4
tan B
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