(sin50°*cos50°)/(cos60°*cos10°)怎样化简

来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 13:15:24
(sin50°*cos50°)/(cos60°*cos10°)怎样化简
x)(358A+9DkkYfPCȳg ?|]MR>z lȳi{m 4+L zAb`}`@YC}\D@YD0/.H̳:LV@ vն@!] œ'?m]tP܎d<`

(sin50°*cos50°)/(cos60°*cos10°)怎样化简
(sin50°*cos50°)/(cos60°*cos10°)怎样化简

(sin50°*cos50°)/(cos60°*cos10°)怎样化简
原式=1/2*(2sinx50cos50)/(1/2*cos10)
=sin100/cos10
=sin(90+10)/cos10
=cos10/cos10
=1

cos60 = 0.5
sin50cos50=0.5sin100=0.5cos10
代入得到
原式=1