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यदि x+ y+ z=xyz तो त्रिकोणमिति द्वारा सि...

यदि `x+ y+ z=xyz` तो त्रिकोणमिति द्वारा सिध्द करों कि :
`(2x)/(1-x^(2)) +(2y)/(1-y^(2)) +(2z)/(1-z^(2)) =(2x)/(1-x^(2)) .(2y)/(1-y^(2)) .(2z)/(1-z^(2))`

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