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Question

\tan A = \frac{m + n}{m - n}

\tan B = \frac{m - n}{m + n}

\tan (A - B)

এর মান কত হবে?

অসংজ্ঞায়িত

2mm

4mm

\frac{2 m n}{m^{2} - n^{2}}

ANS : 4

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