Quantitative Aptitude Trigonometry

ఒకవేళ α రెండవ క్వాడ్రంట్‌లో ఉంటే, \(\sqrt{\frac{1-\sin \alpha}{1+\sin \alpha}}-\sqrt{\frac{1+\sin \alpha}{1-\sin \alpha}}=?\)

1
tan α 
2
2 tan α
3
cot α 
4
2 cot α

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