sin²30°+cos²30°－tan²45°
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/27 05:51:01
sin²30°+cos²30°－tan²45°sin²30°+cos²30°－tan²45°sin²30°+cos²30
sin²30°+cos²30°－tan²45°
sin²30°+cos²30°－tan²45°
sin²30°+cos²30°－tan²45°
sin²30°+cos²30°-tan45°
=(1/4)+(3/4)-1
=1-1
=0