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\( \lim _{x \rightarrow 0} \frac{\sin ^{2}\left(\pi \cos ^{4} x\right)}{x^{4}} \) is equal to: [JEE Main 2021, 31 Aug (S…

Q1

\( \lim _{x \rightarrow 0} \frac{\sin ^{2}\left(\pi \cos ^{4} x\right)}{x^{4}} \) is equal to:

[JEE Main 2021, 31 Aug (Shift 1)]

a

\( \pi^{2} \)

b

\( 2 \pi^{2} \)

c

\( 4 \pi^{2} \)

d

\( 4 \pi \)

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