1.

If sin ^(2) x + (1)/(4) sin^(2) 3x = sin x sin^(2) 3 xthenx =

Answer»

`(n pi)/(2), n in Z`
`2 n pi PM (pi)/(3) , n in Z`
`n pi, n in Z`
`n pi + (-1) ^(n)(pi)/(6), n in Z`

Answer :C::D


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