Answer:
Step-by-step explanation:
When the angle Ф = 0, cos Ф = 6 because the coefficient of the cos function is 6. Thus, the first point you'd want to plot would be (0, 6).
If Ф increases to π/2, cos Ф = 0. Plot (π/2, 0).
If Ф now increases to π, cos Ф = -1. Plot (π, -1).
And so on ... increase Ф by π/2 each time.
