cos²30°+sin²30°+(根号2-1)²+ 负三的绝对值-(tan60°)²

问题描述:

cos²30°+sin²30°+(根号2-1)²+ 负三的绝对值-(tan60°)²

3/4+1/4+2+1-2*根号2+3-3=4-2*根号2