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The set of values of x for which (tan 3x...

The set of values of x for which `(tan 3x - tan 2x)/(1+ tan 3x tan 2x) = 1 ` is

A

`phi`

B

`{(pi)/(4)}`

C

`{npi+(pi)/(4),n=1,2,3..}`

D

`{2npi+(pi)/(4),n=1,2,3..}`

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