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······
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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
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http://jizhaoroom.blog.163.com/blog/static/46365966201092711180728/
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