(tan的平方60°cos45°）/（2sin60°-tan45°）+sin30°cos30du°
=(根号3)^2*根号2/2/(2*根号3/2-1)+1/2*根号3/2
=(3/2)根号2/(根号3-1)+根号3/4
=3/2*根号2*(根号3+1)/(3-1)+根号3/4
=3/4*(根号6+根号2)+根号3/4
=3/4根号6+3/4根号2+1/4根号3.