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6. Prove that sin(A+B)=sinA.cosB+cosA.sinB Sin(A-B)= Cos(A-B)= Cos(A+B)= |
| Answer» 6. Prove that sin(A+B)=sinA.cosB+cosA.sinB Sin(A-B)= Cos(A-B)= Cos(A+B)= | |