请前往标签设置摘要
1sinx=xx^33!+x^55!+1^nx^2n+12n+1!+0^x^2n+22cosx=1x^22!+x^44!x^66!++1^nx^2n2n!+0^x^2n3ln1+x=xx^22+x^33+1^nx^n...