求导数 y=(x∧3-1)/sinx y=2xsin(2x+5) y=(1-根号x3+根号2x)/根

y=(x∧3-1)/sinxy'=[2x²sinx-(x³-1)cosx]/sin²x=(2x²sinx-x³cosx+cosx)/sin²xy=2xsin(2x+5)y'=2sin(2x+5)+2xcos(2x+5)*2=2sin(2x+5)+4xcos(2x+5)y=(1-√x³+√2x)/√x=1/√x-x+√...