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Which of the following is the principal value branch of $\cos^{-1}x$?

$\begin{array}{1 1}(A)\quad\begin{bmatrix}\frac{-\pi}{2},\frac{\pi}{2}\end{bmatrix} & (B)\quad(0,\pi)\\(C)\quad[0,\pi] & (D)\quad(0,\pi)-\left \{\frac{\pi}{2}\right \}\end{array}$
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Ans (C) \( [0, \pi ] \)
answered Feb 18, 2013 by thanvigandhi_1
 
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