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Sinx.siny=1/43tanx=4tanyTo prove =sin(x+y)=7/16 |
| Answer» given that 3/4=tanx/tany3/4=(sinx*cosy)/(cosx.siny)(cosx*siny)*3/4=sinx*cosysin(x+y)=sinxcosy+cosxsinysin(x+y)=sinxcosy(1+3/4)sin(x+y)=(1/4)*(7/4)sin(x+y)=7/16 THANKS | |