Range of the function $f (x) = {sin}^{2} (x^{4}) + {cos}^{2} (x^{4})$ is

(- \infty, \infty)

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{1}

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(- 1, 1)

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(0, 1)

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Solution

The correct option is D ${1}$
$f (x) = {sin}^{2} (x^{4}) + {cos}^{2} (x^{4}) = 1$
Hence, range $= {1}$ .

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