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If x: y : = tan ((pi)/15 + alpha): tan ((pi)/15 + beta): tan ((pi)/15+ gamma)," then "(z+x)/(z-x) sin^(2) (gamma - alpha ) + (x+y)/(x-y) sin^(2) (alpha - beta ) + (y + x) / (y-z) sin^(2) (beta-gamma)=

Answer»

`SIN^(2)THETA`
`COS^(2)theta`
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Answer :C


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