Solving Generally Over the Reals

Sometimes when solving trig equations, we will not be given a domain on which to solve this question, therefore there will be multiple answers from negative infinity to positive infinity. In a situation like this you have to coincide that any answer will occur every 2pi rotations (which is 360 degrees) with this in mind, we will have to make this known in out final answer. To do this we add on to the end of the answer 2kpi or kpi,(depending on how often it occurs). what this says is that for every K (which is an integer) rotations, this answer will occur to infinity.