# Math Help - Solving for an inequality

1. ## Solving for an inequality

Hi,

I have a question which I've been trying to solve for a couple of hours now. Any help would be grateful appreciated:

cos 3x ≤ 1.2x - 1.9

How do I do this???
Thank you

2. Originally Posted by ajaxanon
Hi,

I have a question which I've been trying to solve for a couple of hours now. Any help would be grateful appreciated:

intervals where $\cos(3x) \le 1.2x-1.9$ are $[0.8678,1.5624]$ and $[2.2846,\infty)$