1.

Let f(x)=x^(2) and g(x)= sin x for all x in R. Then the set of all x satisfying (fogogof)(x)=(gogof)(x), where (fog)(x)=f(g(x)), is

Answer»

`pm sqrt(N pi), n in {0,1,2..........}`
`pm sqrt(n pi), n in {1,2,..}`
`pi/2 + 2 n pi, n in {..........,-2,-1,0,1,2......}`
`1N pi, n in {......, -2, -1, 0, 1, 2, ........}`

ANSWER :A


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