a question about complex variable
- To: mathgroup at smc.vnet.net
- Subject: [mg21620] a question about complex variable
- From: ZHU Xiaopeng <xpzhu at red.semi.ac.cn>
- Date: Tue, 18 Jan 2000 02:35:10 -0500 (EST)
- References: <200001170343.WAA13446@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In my algebra computation, I obtain a expression: C = (- I Cos[2 P] - Sin[2 P]) Tan[A] P,A are real variables. Apperently, the argument of C is -2(P+Pi/4) and the absolute value of C is Tan[A]. But when I use Arg[C] and Abs[C], Mathematica tells me: Out[41]=Abs[(-I Cos[2 P] - Sin[2 P]) Tan[A]] Out[42]=Arg[(-I Cos[2 P] - Sin[2 P]) Tan[A]] This problem appeared at beginning of the computation. I have no idea to deal with it, so the expressions become longer and longer during the computation. Can somebody help me?
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