1.已知tan(a+b)=2/5,tan(a+π/4)=3/22,那么tan(b-π/4)=?2.函数y=cosx(sinx+cosx)的最小正周期为?3.如果a∈(π/2,π),且sin(a+π/4)+cos(a+π/4)=?4.在△ABC中,sinA=4/5,cosB=-12/13,则cosC等于?5.根号下1+cos4等于多少?6.tana×tanb
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![1.已知tan(a+b)=2/5,tan(a+π/4)=3/22,那么tan(b-π/4)=?2.函数y=cosx(sinx+cosx)的最小正周期为?3.如果a∈(π/2,π),且sin(a+π/4)+cos(a+π/4)=?4.在△ABC中,sinA=4/5,cosB=-12/13,则cosC等于?5.根号下1+cos4等于多少?6.tana×tanb](/uploads/image/z/4353950-38-0.jpg?t=1.%E5%B7%B2%E7%9F%A5tan%28a%2Bb%29%3D2%2F5%2Ctan%28a%2B%CF%80%2F4%29%3D3%2F22%2C%E9%82%A3%E4%B9%88tan%28b-%CF%80%2F4%29%3D%3F2.%E5%87%BD%E6%95%B0y%3Dcosx%28sinx%2Bcosx%29%E7%9A%84%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F%E4%B8%BA%3F3.%E5%A6%82%E6%9E%9Ca%E2%88%88%EF%BC%88%CF%80%2F2%2C%CF%80%EF%BC%89%2C%E4%B8%94sin%28a%2B%CF%80%2F4%29%2Bcos%28a%2B%CF%80%2F4%29%3D%3F4.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CsinA%3D4%2F5%2CcosB%3D-12%2F13%2C%E5%88%99cosC%E7%AD%89%E4%BA%8E%3F5.%E6%A0%B9%E5%8F%B7%E4%B8%8B1%2Bcos4%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%3F6.tana%C3%97tanb)
1.已知tan(a+b)=2/5,tan(a+π/4)=3/22,那么tan(b-π/4)=?2.函数y=cosx(sinx+cosx)的最小正周期为?3.如果a∈(π/2,π),且sin(a+π/4)+cos(a+π/4)=?4.在△ABC中,sinA=4/5,cosB=-12/13,则cosC等于?5.根号下1+cos4等于多少?6.tana×tanb
1.已知tan(a+b)=2/5,tan(a+π/4)=3/22,那么tan(b-π/4)=?
2.函数y=cosx(sinx+cosx)的最小正周期为?
3.如果a∈(π/2,π),且sin(a+π/4)+cos(a+π/4)=?
4.在△ABC中,sinA=4/5,cosB=-12/13,则cosC等于?
5.根号下1+cos4等于多少?
6.tana×tanb=-1,则sin(a-b)的值为多少?
7.已知tana=1/2,tan(a-b)=-2/5,那么tan(b-2a)的值为?
8.函数y=cos2xcosπ/5-2sinxcosxsin6π/5的递增区间是?
9.若f(tanx)=sin2x则f(-1)的值为?
只要结果,短时间内解决加分
1.已知tan(a+b)=2/5,tan(a+π/4)=3/22,那么tan(b-π/4)=?2.函数y=cosx(sinx+cosx)的最小正周期为?3.如果a∈(π/2,π),且sin(a+π/4)+cos(a+π/4)=?4.在△ABC中,sinA=4/5,cosB=-12/13,则cosC等于?5.根号下1+cos4等于多少?6.tana×tanb
59/116 pai 负根号(1+cos a) 56/65 负根号2cos a 1 -9/8 3pai/5+kpai,8pai/5+kpai -1