启示·联想·类比·变通─谈｜ｚ｜＝１的运用周祥昌（无锡市一中２１０４３１）贵刊１９９３年第８期《观察·猜想·证明·引申》一文，读后颇受启示，特别是构造复数证明三角系列题，思路清晰，方法奇妙，但三角运算还不够简洁，如果能运用Ｚ＝１，解题过程就可缩短，本... Revelations, associations, analogies, and workarounds - The use of z|=1: Zhou Xiangchang (Wuxi No. 210431, Wuxi, China) Your article, “Observation, Conjecture, Proof, Extension”, Issue 8, 1993, is quite inspiring after reading, especially Construct complex number to prove the triangle series problem, the thinking is clear, the method is wonderful, but the trigonometric calculation is not simple enough, if you can use Z=1, the problem-solving process can be shortened, the...