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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 =tan⁡π−cos−1⁡(27)−π2 =tan⁡π2−cos−1⁡(27)=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 $\tan [\cos^{- 1} (- \frac{2}{7}) - \frac{π}{2}]$