Show that tan $\frac{{\mathrm{A}}}{2}$ tan $\frac{{\mathrm{B}}}{2}$ =$\frac{{\mathrm{n}} – 1}{{\mathrm{n}} + 1}$

If A+B+C=π and sin(A+C/2)=n sin C/2,Show that tan A/2 tan B/2=n-1/n+1 If A+B+C=π and sin(A+C/2)=n sin C/2,Show that tan A/2 …

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