Question

draw high and low frequency sinusoidal signal​

Answer 1

you are bad drawing things? then do this.

go to google sheets (or some similar program).

make 4 columns.

on the first column put a 0 in A1 and put in A2 -> =A1+1, then fill it up to 100

on the B1 put the formula =A1*PI()/50 and copy it to fill up 100 rows too

on C1 put the formula =sin(B1) (and copy 100 below)

on D1 put the formula =sin(B1*5) and copy 100 below

then use columns a,c,d to make an x-y graph with lines (so 2 series)

feel free to change the *5 to other value to notice how it changes.