公式一 |
公式二 |
sin(2kπ+α)=sin α cos(2kπ+α)=cos α tan(2kπ+α)=tan α cot(2kπ+α)=cot α sec(2kπ+α)=sec α csc(2kπ+α)=csc α |
sin(π+α)=-sin α cos(π+α)=-cos α tan(π+α)=tan α cot(π+α)=cot α sec(π+α)=-sec α csc(π+α)=-csc α |
公式三 |
公式四 |
sin(-α)=-sin α cos(-α)=cos α tan(-α)=-tan α cot(-α)=-cot α sec(-α)=sec α csc(-α)=-csc α |
sin(π-α)=sin α cos(π-α)=-cos α tan(π-α)=-tan α cot(π-α)=-cot α sec(π-α)=-sec α csc(π-α)=csc α |
公式五 |
公式六 |
sin(α-π)=-sin α cos(α-π)=-cos α tan(α-π)=tan α cot(α-π)=cot α sec(α-π)=-sec α csc(α-π)=-csc α |
sin(2π-α)=-sin α cos(2π-α)=cos α tan(2π-α)=-tan α cot(2π-α)=-cot α sec(2π-α)=sec α csc(2π-α)=-csc α |
公式七 |
公式八 |
sin(π/2+α)=cosα cos(π/2+α)=−sinα tan(π/2+α)=-cotα cot(π/2+α)=-tanα sec(π/2+α)=-cscα csc(π/2+α)=secα |
sin(π/2-α)=cosα cos(π/2-α)=sinα tan(π/2-α)=cotα cot(π/2-α)=tanα sec(π/2-α)=cscα csc(π/2-α)=secα |
公式九 |
公式十 |
sin(3π/2+α)=-cosα cos(3π/2+α)=sinα tan(3π/2+α)=-cotα cot(3π/2+α)=-tanα sec(3π/2+α)=cscα csc(3π/2+α)=-secα |
sin(3π/2-α)=-cosα cos(3π/2-α)=-sinα tan(3π/2-α)=cotα cot(3π/2-α)=tanα sec(3π/2-α)=-cscα csc(3π/2-α)=-secα |