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近读羊光先生“恒等式与2003年上海高考(理科)第22题”一文感到用“一个三角恒等式两边对应项系数相等”的命题来解题是不妥的.
It is not appropriate to read the article “Identity” and the article 22 of the Shanghai College Entrance Examination (Science) in 2003. It is not appropriate to solve the problem with the proposition that the “corresponding coefficient of two sides of a trigonometric identity is equal”.