sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/22 02:03:48
sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
sin²60°+cos²60°
=3/4+1/4
=1
tan45°-sin30°×cos60°
=1-1/2×1/2
=3/4
cos²45°/tan²30°
=(1/2)/(1/3)
=3/2