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\cos^{- 1} x

\sin (\cos^{- 1} x)

এর অন্তরক সহগ

\cos (\cos^{- 1} x)

\frac{- \cos (\cos^{- 1} x)}{\sqrt{1 - x^{2}}}

\frac{- \sin^{1} x}{\sqrt{1 - x^{2}}}

কোনটিই নয়

ANS : 1

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