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Q.The principal value of tan⁡−11+cos⁡−1(−1/2)\tan^{-1} 1 + \cos^{-1} (-1/2)tan−11+cos−1(−1/2) is

Correct Answer: Option A

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Q.The principal value of $\tan^{-1} 1 + \cos^{-1} (-1/2)$ is