# Unit Circle inequality.

1. Jan 2, 2007

### theperthvan

This was an exam question I had at the end of 2005 in my uni entrance exams.
Can you do it?

Establish the inequality

$$xcosx < sinx < x$$ where $$0<x<pi/2$$ using the unit circle.

is the tex working?

2. Jan 2, 2007

### Werg22

Last edited by a moderator: Apr 22, 2017 at 2:56 PM
3. Jan 2, 2007

### theperthvan

That was quick!

Yes, that's it. Cheers,