sinπ/3=根号3/2,那其它的cos、tan、cot的π/3,π/6,π/12分别等于多少啊······

sinπ/3=根号3/2,那其它的cos、tan、cot的π/3,π/6,π/12分别等于多少啊······
sinπ/3=根号3/2,那其它的cos、tan、cot的π/3,π/6,π/12分别等于多少啊······

sinπ/3=根号3/2,那其它的cos、tan、cot的π/3,π/6,π/12分别等于多少啊······
sinπ/3=√3/2
cosπ/3=1/2
tanπ/3=√3
tanπ/3=√3/3
sinπ/6=1/2
cosπ/6=√3/2
tanπ/6=√3/3
cotπ/6=√3
sinπ/12=(√6-√2)/4
cosπ/12=(√6+√2)/4
tanπ/12=2-√3
cotπ/12=2+√3

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

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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/

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