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Question

y = \frac{1}{2} \tan^{- 1} [\frac{\sqrt{1 + \sin x} - \sqrt{1 - \sin x}}{\sqrt{1 + \sin x} + \sqrt{1 - \sin x}}

এর সঠিক সংক্ষিপ্ত রুপ কোনটি?

x= 2y

x = 4y

x + 4y = 0

x - y =0

x +2y =0

ANS : 2

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