How can I find $$\lim_{n \to \infty}{n \cos(\pi/2 + 1/n)}$$ without using L'Hôpital's rule?
Using L'Hopital's rule I can find the answer to be -1, but without it I don't know where to start.
How can I find $$\lim_{n \to \infty}{n \cos(\pi/2 + 1/n)}$$ without using L'Hôpital's rule?
Using L'Hopital's rule I can find the answer to be -1, but without it I don't know where to start.