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\int \frac{1 + \tan^{2} x}{{(1 + \tan x)}^{2}} d x

এর মান কোনটি।

\frac{1}{1 + c o t x} + c

\frac{1}{1 - \tan x} + c

\frac{1}{1 + \cos x} + c

\frac{1}{1 - c o t x} + c

\frac{1}{1 + \tan x} + c

ANS : 5

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