✨ 最佳解答 ✨ あ 6年以上以前 logy=cos(x)log(sin(x)) 微分 y'/y=-sin(x)log(sin(x))+cos(x)×cos(x)/sin(x) ⇔y'=(-sin(x)log(sin(x))+cos²(x)/sin(x))(cos(x)log(sin(x))) 留言