求值cos9π/4+tan(-11π/6)-sin9π/4+tan(--11π/3)
求值tan(π/6-θ)+tan(π/6+θ)+√3tan(π/6-θ)tan(π/6+θ)
反函数求值tan[arcsin(-1/4)+π/3]
求值tan(-6/23π)求值sin75度
求值tan(kπ+π/6)cos(kπ-4π/3),k属于z
tan(a+π4
求值:sin(π/4)cos(19π/6)tan(21π/4)急!
tan(6/π--x)+tan(6/π+x)+根号三倍的tan(6/π--x)乘tan(6/π+x)化简求值
求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-
tan=3,π
化简:{[tan(π/4+a)-tan(π/4-a)]/tan2a} *tan(π/4+a)
化简求值,sin(2a-π)tan(π+a)cota/cos(π-a)tan(3π-a)
tan(a+b)=3/4,tan(a-π/4)=1/2,那么tan(b+π/4)等于多少