What is the exact value of sin 60 – cos 60?

##sin(60)-cos(60)=(sqrt3-1)/2##
The exact values of ##cos(60)## and ##sin(60)## are:
##cos(60)=cos(pi/3)=1/2##
##sin(60)=sin(pi/3)=sqrt3/2##
##rarr sin(60)-cos(60)=sqrt3/2-1/2=(sqrt3-1)/2##