Respuesta :
(
 derivative of 4sin(x)
=(4)'*sin(x)+4*(sin(x))'
=0*sin(x)+4*(sin(x))'
=0*sin(x)+4*cos(x)
=4*cos(x)
 derivative of 4sin(x)
=(4)'*sin(x)+4*(sin(x))'
=0*sin(x)+4*(sin(x))'
=0*sin(x)+4*cos(x)
=4*cos(x)