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Show that tan^-1(xr/yz)+tan^-1(yr/zx)+tan^-1(zr/xy)=π, where , x+y+z=r .

Show that tan^-1(xr/yz)+tan^-1(yr/zx)+tan^-1(zr/xy)=π, where , x+y+z=r .
 

Grade:12th pass

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