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If A= tan27theta - tantheta and B= (sint...

If `A= tan27theta - tantheta` and `B= (sintheta)/(cos 3theta) +(sin 3theta)/(cos 9theta) + (sin 9theta)/(cos 27theta)`, then the value of `(A+B)/(A-B) +(A-B)/(A+B) -10/3` is

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