14/12/21 18:12:03.53
>>38
∫1/( 2－sin(x) )^2 dx＝？
y＝sin(x), dx/( 2－sin(x) )^2＝(1/(2－y)^2) dy/√(1－y^2)
t＝√((1＋y)/(1－y)), dx/( 2－sin(x) )^2＝2(t^2＋1)dt/(t^2＋3)^2
URLﾘﾝｸ(www.wolframalpha.com)
14/12/21 18:12:03.53
>>38
∫1/( 2－sin(x) )^2 dx＝？
y＝sin(x), dx/( 2－sin(x) )^2＝(1/(2－y)^2) dy/√(1－y^2)
t＝√((1＋y)/(1－y)), dx/( 2－sin(x) )^2＝2(t^2＋1)dt/(t^2＋3)^2
URLﾘﾝｸ(www.wolframalpha.com)