1.

Let lt a_n gt be a sequence such that a_1=1and a_n+1 =cos a_n, n gt 1 . If a=lim_(xtooo) a_n, then a belongs to the interval

Answer»

`(0,pi//6)`
`(pi//6,pi//3)`
`(pi//3,pi//2)`
`(pi//2,4pi//3)`

ANSWER :B


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