sin^2 45°-cos60°+tan60°*cos30°

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/08 15:41:57
sin^245°-cos60°+tan60°*cos30°sin^245°-cos60°+tan60°*cos30°sin^245°-cos60°+tan60°*cos30°sin^245=1/2co

sin^2 45°-cos60°+tan60°*cos30°
sin^2 45°-cos60°+tan60°*cos30°

sin^2 45°-cos60°+tan60°*cos30°
sin^2 45=1/2
cos60°=1/2
tan60°*cos30°=tan^2(60)=1/3
1/2-1/2+1/3=1/3
亲不懂再问哦

1/2-1/2+√3*√3/2=3/2