1.

If (sin^(3)"" (x)/(2)-cos^(3)""(x)/(2))/(2 + sin x) = (cos x)/( 3)then x =

Answer»

`n pi +(pi)/2, n in Z`
`2 n pi+(pi)/2, n in Z`
`n pi-(pi)/2, n in Z`
`2 n pi-(pi)/2, n in Z`

ANSWER :B


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