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| 1. |
If sin (A-B) =1/2,cos(A+B)=1/2,0 degree |
| Answer» Sin(A-B) =sin30 (we know sin30= 1/2)Cos(A+B)=cos60 (we know cos60=1/2)A-B=30 _(1)A+B=60 _(2) now 2A=90A=45 Put value of A in eq 1 A-B=30 ;B=15 | |