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Quotient rule for derivative of tan x | Product and quotient rules | Khan Academy

Since tan(x) = sin(x)/cos(x), it is great candiate for applying the quotient rule. ... Art history basics Prehistoric art in Europe and West Asia Art of the ancient Mediterranean Art of Medieval Europe Art of the Islamic world...

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 翻拍自臉書(經網友獲權同意,未經同意不得轉載)    還記得前陣子在跟男生朋友聊天他說「我覺得女生不要太獨立,這樣子會讓喜歡的男生很心疼。」他很喜歡ㄧ個女孩那位女孩在別人的眼中很獨立她曾告訴他:自己能做的事,為什麼要麻煩別人?他也告訴她:妳如果叫我做,我就不覺得麻煩...

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