## Introduction

When we found **unknown trigonometric function** or **trigonometric function of some** **unknown function** in at least one member of an inequality we say that this inequality is **trigonometric**

*Examples:*

1) sin x> and sen^{2} x + tg 2 **are** trigonometric inequalities.

2) (sen 30º). (x^{2} - 1) > 0 **they are not** trigonometric inequalities.

Resolving an inequality as f (x) <g (x), for example, means determining the set **s** of numbers **s**, where s is a domain element of **f** it's from **g**such that f (s) <g (s).

The set **s** it's called **solution set** of inequality and every element of **s** is **solution** of inequality.

Thus, in the inequality sen x> , the numbers are some of your solutions and the numbers they are not.

Next: Resolving Inequalities (Part 1)