>>706
(1+cos(x))倍でもうまくいくぞ
(exp(x^2)-1)/(1-cos(x)) = (1+cos(x))(exp(x^2)-1)/(sin(x))^2 = (1+cos(x)) ((exp(x^2)-1)/x^2) / (sin(x)/x)^2

>>707
＞ x→0で (exp(x^2)-1)/x^2 →e
そんなはずがない