推 znmkhxrw:let e^t = x , let x = tany 1.169.132.113 09/27 21:33
→ znmkhxrw:ans = siny = x/(x^2+1)^0.5 1.169.132.113 09/27 21:33
→ znmkhxrw:= e^t / (e^(2t)+1)^0.5 1.169.132.113 09/27 21:34
→ nightseven:太感謝了!!!!!(泣) 125.230.64.49 09/27 21:43
e^t
∫------------------------ dt
[e^(2t) + 1]^(1.5)
代換好多次，都一直錯。好挫折...
拜託各位大大了!!!!!!
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