Let f(x)=x^2a n dg(x)=sinxfora l lx in ...

Let `f(x)=x^2a n dg(x)=sinxfora l lx in Rdot` Then the set of all `x` satisfying `(fogogof)(x)=(gogof)(x),w h e r e(fog)(x)=f(g(x)),` is `+-sqrt(npi),n in {0,1,2, dot}` `+-sqrt(npi),n in {1,2, dot}` `pi/2+2npi,n in { ,-2,-1,0,1,2}` `2npi,n in { ,-2,-1,0,1,2, }`

`pm sqrt(npi) , n ion {0,1,2,…}`

`pm sqrt(npi) , n in {1,2,…}`

`pi/2 + 2 n pi, n in {…, -2 -1, 0,1,2…}`

`2 npi , n in {…, -1 -1 , 0,1,2…}`

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