If f (x) =sin x+cos x, x in (-oo, oo) an...

If `f (x) =sin x+cos x, x in (-oo, oo) and g (x) = x^(2), x in (-oo,oo)` then (fog)(x) is equal to

`sin ^(2) (x) + cos (x^(2))`

`sin (x ^(2)) + cos(x ^(2))`

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