Answer:
graph attached
Step-by-step explanation:
A graph is a pictorial representation that represent the relationship between two or more things.
Cosine function is periodic with period [tex]2\pi[/tex] . If the point [tex](x,y)[/tex] lies on the graph, point [tex](x+2k\pi ,y)[/tex] will also lie on the graph where k is any integer.
Here,
[tex]cos(x-\pi )=cos[-(\pi -x)]=cos(\pi -x)=-cos x[/tex]
