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Mathematics 11 Online
OpenStudy (anonymous):

if tan^-1( x) + tan^-1(y) + tan^-1(z) = pi or pi/2, show that x+y+z = xyz or xy + yz + zx = 1;

OpenStudy (anonymous):

dude u got obj 4th one

OpenStudy (anonymous):

no da..have to try.

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