Show that if \( a \) and \( b \) are real, then the principal value... VIDEO
Show that if \( a \) and \( b \) are real, then the principal value of \( \arg (a) \) is 0 or \( \pi \), according as \( a \) is positive or negati \( x \) andhttps://bit.ly/YTAI_PWAP https://www.pw.live
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