Question

Which of the following is the best linear approximation for f(x) = cos(x) near x=pi/2?

Answer 1

Can someone show me how to do linear approximation? @zepdrix

Answer 2

@jigglypuff314

Answer 3

Have you considered the first derivative?

Answer 4

I don't even know what linear approximation is, so no.@tkhunny

Answer 5

From what I recall linear approximations were of the form \[f(x) \approx f'(a)(x-a)+f(a)\]

Answer 6

What is it you're looking for scope?
Like how it works in general?
Or just need some steps to figure this one out?

Answer 7

How to do this in general? Including steps.