※ 引述《kidd0717 (胖)》之銘言:
: ∫arcsin[(x / (x + a))^1/2] dx = ?
: 先謝過了@@
令(x / (x + a))^1/2=sin(y)
csc^2(y)=1+a/x
x=a*tan^2(x)
dx=2a(tan(y))(sec^2(y))dy
原式=2a∫y(tan(y))(sec^2(y))dy
列表積分
y 2(tan(y))(sec^2(y))
1 (tan(y))^2
0 y-tan(y)
Ans: a[y(tan(y))^2-y+tan(y)]+C
有錯請指正~~XD
謝謝~
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