[" 38.If "3x=cosec theta" and "(3)/(x)=c...

[" 38.If "3x=cosec theta" and "(3)/(x)=cot theta" then "3(x^(2)-(1)/(x^(2)))=?],[[" (a) "(1)/(27)," (b) "(1)/(81)," (c) "(1)/(3)," (d) "(1)/(9)]]

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