Evaluate: \[ \cos \left(\sec ^{-1} x+\operatorname{cosec}^{-1} x\right),|x| \geq 1 \] \( \mathrm...

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Evaluate:
\[
\cos \left(\sec ^{-1} x+\operatorname{cosec}^{-1} x\right),|x| \geq 1
\]
\( \mathrm{P} \)
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