Step-by-step explanation:
we can use the equation
[tex]n(sinu)(sinv)= \frac{n}{2} [cos(u-v)-cos(u+v)][/tex]
Where
n = 16
u = 16x
v = 11x
We can substitute in these values to get the sum
[tex]\frac{16}{2} [cos(16x-11x)-cos(16x+11x)][/tex]
This can be simplified to
[tex]8[cos(5x)-cos(27x)][/tex]
