这道题目怎么做
sin50°(1+√3tan10°)怎么化简,要详细步骤 "√"是根号的意思,同时点V和1就会有的
其实好简单,就是利用公式啊 解: sin50°(1+√3tan10°) =sin50°(1+√3sin10°/cos10°) =sin50°[(cos10°+√3sin10°)]/cos10° =2sin50°[(cos10°/2+√3sin10°/2)]/cos10° =2sin50°[(cos(60°-10°)]/cos10° =2sin50°cos50°/cos10° =sin100°/cos10° =cos10°/cos10° =1 知道了吗?OK?
厉害
大家都说了,还有什么说的?!
解: sin50°(1+√3tan10°) =sin50°/cos10°(cos10°+√3sin10°) =2sin50°sin40°/cos10° =2sin50cos50°/cos10° =sin100°/cos10° =cos10°/cos10° =1
怎么“点”:V和1 啊? 请教!
sin50°(1+√3tan10°)=2sin50°(sin30°+cos30°sin10°/cos10°) =2cos40°(sin30°cos10°+cos30°sin10°)/cos10° =2cos40°sin40°/cos10°=sin80°/cos10°=1
解:Sin50(1+√3tan10) =2sin50(1/2+√3sin10/(2cos10)) =(2sin50/cos10) *(1/2 cos10+√3/2 * sin10) =2sin50*cos(60-10)/cos10 =sin100/cos10 =sin(90+10)/cos10 =cos10/cos10 =1
sin50°(1+√3tan10°) =sin50°(1+√3sin10°/cos10°) =sin50°[(cos10°+√3sin10°)]/cos10° =2sin50°[(cos10°/2+√3sin10°/2)]/cos10° =2sin50°[(cos(60°-10°)]/cos10° =2sin50°cos50°/cos10° =sin100°/cos10° =cos10°/cos10° =1
答:根号21用计算机算就可以啦,用不着化简的。如果您觉得正确或者采纳的话,麻烦给我好评,谢谢。详情>>
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