你这是寒假作业吧啊. 孩子不好呀~ sin378°21′≈0.31482 tan1111°≈0.60086 cos642.5°≈0.21644 可知tan1111°＞sin378°21′＞cos642.5° sin(-879°) = -0.3583679495453 tan(-8/(33*π)) = -0.07731956290865cos(-10/(13*π)) = 0.97017278637437sin(3) = 0.14112000805987cos(sin(2)) = 0.61430028211648