al. If tan A =%, dan B =%, andtar(A+B)- tan A+ taus BIntan a tane. And – InterviewSolution

1.	al. If tan A =%, dan B =%, andtar(A+B)- tan A+ taus BIntan a tane. Andsin?0+B) + cos?C9+B) ?
Answer» tan(A+B)=1/2+1/3/1-1/2*1/3=5/6/5/6=1henceA+B=tan^-1(1)=π/4hencesin^2(π/4)+cos^2(π/4)=1/2+1/2=1

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