# Math Help - Need a detailed explanation

1. ## Need a detailed explanation

Please prove this in detail.
~Kalyan.

2. Originally Posted by kalyanram
Please prove this in detail.
~Kalyan.
This would seem to be a generalization of your other post. Take a look at the hint I gave you there. Now we have $cos(\theta) = 1$, so the sum of the cosine series will be N. What does that say for the limit?

-Dan