Solve: tan3theta+tantheta=0...

Solve: `tan3theta+tantheta=0`

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`tan3theta+tantheta=0`
`rArr tan3theta=-tantheta`
`rArr tan3theta=tan(-theta)`
`rArr 3theta=npi+(-theta)`
`rArr 4theta=npi`
`rArr theta=(npi)/4` Ans.

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