sin²40°+sin²50°+tan²40°tan²50°的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 15:32:44
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sin²40°+sin²50°+tan²40°tan²50°的值
sin²40°+sin²50°+tan²40°tan²50°的值
sin²40°+sin²50°+tan²40°tan²50°的值
sin²40°+sin²50°+tan²40°tan²50°
= sin²40°+cos²40°+tan²40°cot²40°
=1+1
2