All work will be done in Python. It's important that this is kept in mind. I will follow up on this question and will give a thumbs up once the question is correctly answered in Python.

2. Show that the identity (cos x)2 1 (1 + cos(2x) holds for the following values of x: 7T a) x = 6 b) x = : 1.25 1 c) Since this is an identity, f(x) = (cos x)2 5 (1 + cos(2x)) should be zero 2 for all x. Plot f on the domain x e [0, 21). If you do not get the line y = 0, explain why (hint: look at the y-axis scale)