(1-tan^2π/12)/(tanπ/12)化简
化简:tan(π/8)+1/tan(π/12)
tan(π/12)+1/tan(π/12)=啥?
化简tan(18-x)tan(12+x)+根号3[tan(18-x)+tan(12+x)]
化简:[sin(π+α)*cos(π-α)*tan(π-α)]/[cos(π/2+α)*tan(3π/2-α)*tan(
已知tan(π/12+α)=根号2,tan(β-π/3)=2根号2,求tan(α+β)的值
tanπ/12-cotπ/12
数学tan(α-π/2)=1/2 tan(π+β)=3 则 tan(α+β)=?
tan(a+b)=3/4,tan(a-π/4)=1/2,那么tan(b+π/4)等于多少
怎么证明tan(π/(2k+1))×tan(2π/(2k+1))×tan(3π/(2k+1))×.tan(k/(2k+1
已知A、B是锐角,求证(tan(π+A)+tan(-B))/(1/tan(3π-A)+tan(π/2-B))=tanA*
关于三角函数恒等变化1-1/2tanα-1/2tan(π/4-α)=2-1/2[(1+tanα+1/(1+tanα)]
化简 sin2α(1+tanαtanα/2)