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Find the general solutions of the following equations: `tan2theta=0` (ii) `tan(theta/2)=0` (iii) `tan(3theta)/(4)=0`

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(i) `tan 2theta = 0`
`=>tan 2theta = tan 0`
`=>2theta = npi+0`
`=> theta = (npi)/2`
(ii)`tan (theta/2) = 0`
`=>tan (theta/2) = tan 0`
`=>(theta/2) = npi+0`
...
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