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Find gof and fog, if f :R rarr R and g:...

Find gof and fog, if f :R `rarr` R and g:R`rarr` R are given by
(i) f(x) = sinx and g(x) = `4x^(2)`.
(ii) f(x) = `x^(2)` and g(x) = 2x +1.

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