1.

Integration using rigonometric identities : int(sin theta)/(cos3 theta)+(sin 3 theta)/(cos9 theta)+( sin9 theta)/(cos 27theta)d theta=...+c

Answer»

`(1)/(2)LOG|(sec 27 THETA)/(sec theta)|`
`(1)/(2)log|(sec theta)/(sec 27theta)|`
`(1)/(2)log|sqrt((sec theta)/(sec 27theta))|`
None of these

Answer :C


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