sin²30°+cos²30°－tan²45°

来源：学生作业帮助网编辑：六六作业网时间：2024/11/25 13:34:38

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