How do I fix my calculator display?

#tan30^o# should be equal to #1/sqrt(3)# but my calculator displays #sqrt(3)/3# which is #1/sqrt(3)# multiplied by #sqrt(3)# to make a whole denominator, but I don't want that I want it to display #1/sqrt(3)#

Anyone know how to do that I have a fx-9860GII