cos432-cot329+tan139*cot499+cos252-cot571
来源：学生作业帮助网 编辑：六六作业网 时间：2024/10/06 14:35:11
cos432-cot329+tan139*cot499+cos252-cot571cos432-cot329+tan139*cot499+cos252-cot571cos432-cot329+tan1
cos432-cot329+tan139*cot499+cos252-cot571
cos432-cot329+tan139*cot499+cos252-cot571
cos432-cot329+tan139*cot499+cos252-cot571
=cos72°+cot31° +tan139°*cot139°+cos108°-cot31°
=cos72°-cos72°+tan139°*cot139°+cot31° -cot31°
=0+1+0
=1