1、sin(A+B)=sinAcosB+cosAsinB
2、sin(A-B)=sinAcosB-sinBcosA
3、cos(A+B)=cosAcosB-sinAsinB
4、cos(A-B)=cosAcosB+sinAsinB
5、tan(A+B)=(tanA+tanB)/(1-tanAtanB)
6、tan(A-B)=(tanA-tanB)/(1+tanAtanB)
1、sin(A+B)=sinAcosB+cosAsinB
2、sin(A-B)=sinAcosB-sinBcosA
3、cos(A+B)=cosAcosB-sinAsinB
4、cos(A-B)=cosAcosB+sinAsinB
5、tan(A+B)=(tanA+tanB)/(1-tanAtanB)
6、tan(A-B)=(tanA-tanB)/(1+tanAtanB)