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[" 12.If "(cos x)/(cos y)=2" and "cos(x-...

[" 12.If "(cos x)/(cos y)=2" and "cos(x-y)=(sqrt(3))/(2)" then "tan y=],[[" 1) "sqrt(3)+4," 2) "sqrt(3)+1" 3) "sqrt(3)-4" 4) "sqrt(3)-1]]

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