If \( z \) is a complex number of unit modulus and argument \( \the...

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If \( z \) is a complex number of unit modulus and argument \( \theta \), then \( \arg \left(\frac{1+z}{1+\bar{z}}\right) \) equals to
\( \mathrm{P} \)
[JEE Main 2013, 4M]
W
(a) \( \frac{\pi}{2}-\theta \)
(b) \( \theta \)
(c) \( \pi-\theta \)
(d) \( -\theta \)
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