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QUESTION
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##
