Question

The graph of cosine function Y=cos θ  is drows as follows make a table of values of cos θ for every 30° from 0° to 360 inclusive.

Answer 1

you have surely learned the value of the trig functions for 0,30,60,90,...
These repeat in every quadrant, either plus or minus.
for x>90, cosx = -cos(180-x)
and so on