WBJEE 2022 Math Solved Paper

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Question : 18 of 75

Marks: +1, -0

Let

lim

E→0+

‌

x

∫

E

‌

bt‌cos‌4‌t−a‌sin‌4‌t

t2

dt=‌

a‌sin‌4‌x

x

−1,(0<x<π∕4). Then a and b are given by

a=2,b=2
a=1∕4,b=1
a=−1,b=4
a=2,b=4

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