f(x)可微,y=f(sinx)-sinf(x),求dy,
问题描述:
f(x)可微,y=f(sinx)-sinf(x),求dy,
答
y‘=f’(sinx)cosx-cosf(x)*f'(x)
dy=[f’(sinx)cosx-cosf(x)*f'(x)]dx确定吗?当然。绝对没错