Here, b = 8, so the period is 2π/8 = π/4. To draw 2 cycles, we will need to graph from 0 to π/2 along the x-axis.

Now for interest, let's see what it looks like from 0 to 2π.

Note that there are 8 cycles between 0 and 2π.

Also, note that we started the graph at x = 0, but we could have started anywhere. As long as we draw exactly 2 cycles, we are answering the question.