1.

The most general value of x for which sinx+cosx= "min"_(a in R) {1, a^(2)-4a+6} are given by

Answer»

`2n pi+(pi)/(6)`
`2n pi+(pi)/(3)`
`N pi+(-1)^(n)(pi)/(4)-(pi)/(4)`
`NPI`

Answer :C


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