Question

Solve system of inequalities by graphing

Y<2-x
Y>x+4

Answer 1

This question has nothing to do with trigonometry.

Draw a line with slope +1 passing through (0,4)
Draw a line with slope -1 passing through (0.2)

The solution region is right of the first line and left of the second line. It starts at (-1,3) and is under an inverted V below that point.