MQ54 --- Trigonometry
2012-11-24 12:53 am
MQ54 --- TrigonometryDifficulty: 50% Evaluate Σ(k = 0 to n – 1)cos[(2k + 1)π]/(2n + 1)].
回答 (1)
2012-11-24 1:33 am
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https://hk.answers.yahoo.com/question/index?qid=20121123000051KK00286