化简:[tan(5π)/4+tan(5π)/12]/[1-tan(5π)/12]
化简:tan(π/8)+1/tan(π/12)
tan(π/12)+1/tan(π/12)=啥?
在tan(α+ β)=2/5,tan(β -π/4)=1/4,则tan(α+π/4)的值为?
tan(α+β)=3/5,tan(β-π/4)=1/4,则tan(α+π/4)值为
若tan(A+B)=2/5,tan(A-π/4)=1/4,则tan(B+π/4)等于多少?
若(1-tanα)/(1+tanα)=4+√5,则tan(π/2-2α)的值
tan(a-3/π) =2 tan(3/π-B)=2/5 求tan(a+b)=
tan(a-5π)=-tana
1.已知tan(a+p)=2/5,tan(p-π/4)=1/4,则tan(a+π/4)=?2.已知sina=-1/3,a
若tan(α+π/4)=-3/5,求tan(α-π/4)的值
(1)tan(-1/5 π)与tan(-3/7 π)(2).
正切函数比大小!tan(-13/4π)与tan(-17/5π)