- #1

- 304

- 14

## Homework Statement

show that 1-t^2/2 <=cos(t) <=1 for 0<=t<=1

## Homework Equations

Trigonometry knowledge

## The Attempt at a Solution

I don't know how to relate t with cos(t), and I also try to find out cos(1), but there is no result, so how can I start with this problem.