dy=f(x)cx 求法:计算函数的导数,乘以自变量的微分 1基本初等函数的微分公式 d(C)=0 d(x")=uxo d(sin x)=cos xdx d(cosx)=-sin xdx d(tanx)=sec xdx d(cot x)=-csc xdx d(secx)=secxtanxdx d(cscx)=-cscxcotxdx Economic-mathematics 18-11 Wednesday, February 24, 2021Economic-mathematics 18- 11 Wednesday, February 24, 2021 dy = f (x)dx 求法: 计算函数的导数, 乘以自变量的微分. 1.基本初等函数的微分公式 d x x xdx d x x xdx d x xdx d x xdx d x xdx d x xdx d C d x x d x (sec ) sec tan (csc ) csc cot (tan ) sec (cot ) csc (sin ) cos (cos ) sin ( ) 0 ( ) 2 2 1 = = − = = − = = − = =  − 