推 powernba:用半角積分如何? 122.118.251.31 09/11 17:55
→ BaBi:就算積出來也很醜... 114.46.142.20 09/11 19:05
→ BaBi:確定題目是1/(1+sinx)^(1/2)無誤嗎... 114.46.142.20 09/11 19:15
→ yhliu:1+sin(x)=1+cos(π/2-x)=2cos^2(π/4-x/2) 111.252.127.94 09/12 00:37
→ BaBi:y大這樣換掉快上不少@@ 114.46.142.20 09/12 01:02