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Evaluate underset(xto0)lim(8)/(x^(8)){1-...

Evaluate `underset(xto0)lim(8)/(x^(8)){1-"cos"(x^(2))/(2)-"cos"(x^(2))/(4)+"cos"(x^(2))/(2)"cos"(x^(2))/(4)}.`

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The correct Answer is:
8
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