How to plot the graph of #f(x)=cos 8(pi)#?

1 Answer
Jul 28, 2015

Answer:

The line #y = 1#.

Explanation:

First of all, note that there is no dependence of the function on #x#. Thus it is a constant function. We need to find the value of the function.

We know that the period of #cos# is #2pi#. Thus we write:
# cos(8pi) = cos(0 + 4 . 2pi) = cos(0) = 1 #

Thus the graph of the function is #y = 1#, a line parallel to the x-axis having y-intercept of 1.