搞笑沒那麼簡單!小幽默大智慧!│大拓文化
Trig Identities: cos^2(2x) + sin^2(2x), os^2(x)-1/sin(x),德國傑出的自然學家亞歷山大.洪堡德在喀山拜訪俄國非歐幾何學的創建者羅巴切夫斯基時,他問數學家:「為什麼您只研究數學呢?據說您對礦物學的造詣也很深,對植物學也很精通。」「是的,我很喜歡植物學,」羅巴切夫斯基回答說:「將來等我結了婚,我一定建一個溫室……」 「那您就趕快結婚吧Too bad your notation is not clear enough. If you mean for the entire expression to be in the numerator, you will need to write it like this: [cos^2(x)-1]/sin(x) = [1-sin^2(x)-1]/sin(x) = -sin^2(x)/sin(x) = -sin(x) And, really, what do you have against th...
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