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Find the most general solution of the fo...

Find the most general solution of the following
`(i) sin6x=sin4x-sin2x`
`(ii) sec4x-sex2x=2`
`(iii)tan((pi)/(4)+x)+tan((pi)/(4)-x)=2`

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The correct Answer is:
`(i)x=(npi)/(4) or x=mpi+-(pi)/(6)` where `m,n in I`
`(ii) x=(2n+1)(pi)/(10)` where `n in I`
`(iii) x=mpi`, `m in I`
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