sin60°+√2cos45°/(0.5*cos30°-tan45°)+4tan60°=?
问题描述:
sin60°+√2cos45°/(0.5*cos30°-tan45°)+4tan60°=?
答
=(√3/2)+(√2)×(√2/2)/【0.5×(√3/2)-1】+4√3
=(√3/2)+(1)/【(√3-4)/4】+4√3
=(9√3)/2+4/(√3-4)
=(9/2)√3-4(4+√3)/5
=4.3√3-3.2