转换公式:tan(x)=sin(x)/cos(x)
tanα ·cotα=1、sinα ·cscα=1、cosα ·secα=1
sinα/cosα=tanα=secα/cscα、cosα/sinα=cotα=cscα/secα
sin^2(α)+cos^2(α)=1
1+tan^2(α)=sec^2(α)
1+cot^2(α)=csc^2(α)
转换公式:tan(x)=sin(x)/cos(x)
tanα ·cotα=1、sinα ·cscα=1、cosα ·secα=1
sinα/cosα=tanα=secα/cscα、cosα/sinα=cotα=cscα/secα
sin^2(α)+cos^2(α)=1
1+tan^2(α)=sec^2(α)
1+cot^2(α)=csc^2(α)
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