文档介绍：公式一sin(2kπ+α)=sinα(k∈Z)cos(2kπ+α)=cosα(k∈Z)tan(2kπ+α)=tanα(k∈Z)cot(2kπ+α)=cotα(k∈Z)公式二sin(π+α)= -sinαcos(π+α)=-cosαtan(π+α)=tanαcot(π+α)=cotα公式三sin(-α)=-sinαcos(-α)=cosαtan(-α)=-tanαcot(-α)=-cotα公式四sin(π-α)=sinαcos(π-α)=-cosαtan(π-α)=-tanαcot(π-α)=-cotα公式五sin(2π-α)=-sinαcos(2π-α)=cosαtan(2π-α)=-tanαcot(2π-α)=-cotα公式六sin(π/2+α)=cosαsin(π/2-α)=cosαcos(π/2+α)=-sinαcos(π/2-α)=sinαtan(π/2+α)=-cotαtan(π/2-α)=cotαcot(π/2+α)=-tanαcot(π/2-α)=tanα公式七sin(3π/2+α)=-cosαsin(3π/2-α)=-cosαcos(3π/2+α)=sinαcos(3π/2-α)=-sinαtan(3π/2+α)=-cotαtan(3π/2-α)=cotαcot(3π/2+α)=-tanαcot(3π/2-α)=tanα