Trigonometric equation

A trigonometric equation is any equation that contains a trigonometric function. In order to solve a trig equation, we have to use both the reference angle we have memorized and a lot of algebra we have learned. For example, solve sin(x)+2=3 for 0 degree < x< 360 degree. I'll first isolate the variable containing term. Sin(x)+2=3 sin(x)=1. Now I'll use the reference angle I have memorized x=90.