sinπ/3=根号3/2,那其它的cos、tan、cot的π/3,π/6,π/12分别等于多少...
发布网友
共1个回答
热心网友
cosπ/3=1/2 cosπ/6=根号3/2 cosπ/12=（√6+√2）/4
tanπ/3=根号3 tanπ/6=根号3/3 tanπ/12=（√6-√2）/（√6+√2）=
2-√3
cotπ/3=根号3/3 cotπ/6=根号3 cotπ/12=（√6+√2）/（√6-√2）=2+√3
附赠常用三角函数表！
http://jizhaoroom.blog.163.com/blog/static/46365966201092711180728/
