The Student Room Group
Reply 1
1. When is r max.

In this case r is max when cos theta is Zero. So in the given limits check where the values of theta.

2. Remeber the axis for which cos,sin graph does exist. (thats all in book) (if edexcel)

3. Plot a few values and thats it.

.A.
Reply 2
I always do a table of results and join up the dots :smile:

Latest