Respuesta :
We know that (5/4)sin(pi) = 0
and (5/4)sin(3pi/2) = -5/4
The curve between x=pi and 3pi/2 is monotonic decreasing, so the
range of (5/4)sin(x) for pi<= x <= 3pi/2 is [-5/4,0]

We know that (5/4)sin(pi) = 0
and (5/4)sin(3pi/2) = -5/4
The curve between x=pi and 3pi/2 is monotonic decreasing, so the
range of (5/4)sin(x) for pi<= x <= 3pi/2 is [-5/4,0]