The maximum value of \( \sec ^{-1}\left(\frac{7-5\left(x^{2}+3\right)}{2\left(x^{2}+2\right)}\ri...
The maximum value of \( \sec ^{-1}\left(\frac{7-5\left(x^{2}+3\right)}{2\left(x^{2}+2\right)}\right) \) is
(a) \( \frac{5 \pi}{6} \)
(b) \( \frac{5 \pi}{12} \)
(c) \( \frac{7 \pi}{12} \)
(d) \( \frac{2 \pi}{3} \)
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