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\sin^{- 1} \frac{4}{5} + \cos^{- 1} \frac{2}{\sqrt{5}}

সমান -

\tan^{- 1} \frac{2}{11}

\sin^{- 1} \frac{11}{12}

\tan^{- 1} \frac{11}{2}

\cos^{- 1} \frac{11}{2}

ANS : 3

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