Tang Jiacheng's answer to jane's Junior College 2 H2 Maths question.

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Tang Jiacheng
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jane
Jane
7 years ago
Hello arg(cotx/2) is what ah? I know arg(i) is (pi/2).
Tang Jiacheng
Tang Jiacheng
7 years ago
In this case, theta is constant for a given number z. So as long as we take theta to be positive (and less than pi), cot(theta/2) will just be a positive real constant, and its argument is 0.