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Find the general solution : sec^2 2x=...

Find the general solution : `sec^2 2x=1-tan2x`

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Given equation is:
`sec^2 2x=1-tan2x`
`=>1+tan^2(2x)=1-tan2x`
`=>tan^2(2x)=-tan2x` [Cancelling out 1 from both sides]
...
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