0756132人目の素数さん垢版 | 大砲2018/11/15(木) 16:32:55.50ID:fMjWRK3Z ∫ sqrt( (1 - x) / (1 + x) ) dx = ∫ (1 - x) * sqrt( 1 / (1 - x^2) ) dx = ∫ (1 - x) * (arcsin(x))' dx = (1 - x) * arcsin(x) + ∫ arcsinx dx = (1 - x) * arcsin(x) + x * arcsin(x) + sqrt(1 - x^2) = arcsin(x) + sqrt(1 - x^2)