已知
,且
,则![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/cc086b1b414044e1a174340b07c02ae4.png?resizew=51)
_____ ,![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/101f25dd9049443cb3321d07904e4d59.png?resizew=41)
_____ ,![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/0132305e1ff840c7b445d1b125cbec03.png?resizew=43)
_____ .
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/08402bbb656847cea23db9d8b08b0dcd.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/c2e7ef17a8634079aa14cca904bbfd63.png?resizew=92)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/cc086b1b414044e1a174340b07c02ae4.png?resizew=51)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/101f25dd9049443cb3321d07904e4d59.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572536189100032/1572536195014656/STEM/0132305e1ff840c7b445d1b125cbec03.png?resizew=43)
更新时间:2016-12-04 03:55:59
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【推荐2】若α∈
,且sin2α+cos2α=
,则tanα=______ ;
![](https://img.xkw.com/dksih/QBM/2017/4/28/1675329782292480/1691811802292224/STEM/dc1288a4e2164b3da8480595cc87987b.png?resizew=40)
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