||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
#Plotting the function
#It can be seen from the figure that function is even in the given interval
x=var('x')
f=function('f',x)
f=abs(sin(5*x))
f.plot(xmin=-pi,xmax=pi)

/* code_ends */

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