麻烦求近似值不要根号的,只要约等于的,计算机坏了, 答案 sin57°18′:0.8415107819tan22°30′=根号2-1=0.4142135624tan83°6′=8.386251933cos4°59′=0.9962200085tan12°30′=0.2216946626sin15°=(根号6-根号2)/4=0.2588190451相关推荐 1sin57°18′——tan22°30′,tan83°6′——cos4°59′,tan12°30...