1.

If sin^(4)(x//3)+cos^(4)(x//3)gt1//2 then x in ________

Answer»

`R - { X // x = ( 3 n pi)/( 2) PM (pi)/( 4), n in Z}`
`R - { x // x = ( 3 n pi)/( 2) pm (pi)/( 2), n in Z}`
`R - { x // x = ( 3 n pi)/( 2) pm (3pi)/( 4), n in Z}`
`R - { x // x = ( 3 n pi)/( 2) pm (3pi)/( 2), n in Z}`

ANSWER :C


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