tan(2π+α)=tanα
tan(-α) =-tanα
tan(π-α) =-tanα
tan(π+α) =tanα
tan(α-β) =(tanα-tanβ)/(1+tanα×tanβ)
tan(π/2+α)=-cotα
tan(π/2-α)=cotα
tan(2π+α)=tanα
tan(-α) =-tanα
tan(π-α) =-tanα
tan(π+α) =tanα
tan(α-β) =(tanα-tanβ)/(1+tanα×tanβ)
tan(π/2+α)=-cotα
tan(π/2-α)=cotα
上一篇:全国总工会福利发放规定细则
下一篇:如何评价海底捞的服务呢