y=a'b

ab '

From the derivative formula of the compound function y=ux, we can know that:

y'=u'x '

∴y'=(2x)'

sin(2x

5)

2x

[sin(2x

5)]'→ Put w=sin(2x

5) Let w=sinu and u=2x.

5、∴[sin(2x

5)]'=(sinu)'u'=cosu*2=cos(2x

5)*2

= 2 inches (2 times

5)

2xcos(2x

5)*2

= 2 inches (2 times

5)

4xcos(2x

5)