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$The value of \tan \{\cos^{- 1} (\frac{- 2}{7}) - \frac{π}{2}\}$

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Correct option is A

tan⁡cos−1⁡−27−π2 since cos-1-x=π- cos-1x=tan⁡π−cos−1⁡27−π2 since sin-1x + cos-1x = π2=tan⁡sin−1⁡27=tan⁡tan−1⁡235=235

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The value of tan⁡cos−1⁡−27−π2

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$The value of \tan \{\cos^{- 1} (\frac{- 2}{7}) - \frac{π}{2}\}$