回复：where x is bigger than 0 and smaller than pi/6

I can answer you for radians.It is inpossible.
e^yi=isiny.The question transfer to ealier one.Because "degree",in fact, is transcedental number,30=pai/6...,I guess this is a open question.If you take a number from number line random,you have 100% probability getting transcedental number(!!!) ,though there are infinite algebra numbers "near" it.If you want know more,read math book "set theory".