1cos60度分之tan30度+cos30度等于多少

sin30 = 1/2 sin45 =三分之二两个sin60 =三分之二三sin90 = 1
tan30 =三tan45 = 1 tan60 =三分之二三tan90意义
cos30 =三分之二三cos45 =三分之二有两个cos60 = 1/2 cos90 = 0