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Find the value of a such that f(x)= (1-cos(4x))/x^2) x0

Find the value of a such that f(x)= (1-cos(4x))/x^2) x0

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Grade:12

1 Answers

Arun
25750 Points
6 years ago
Dear student
as we know
lim (x = 0) 1 –cos x / x2 =  1/2
now
lim (x = 0) 16* {1 –cos 4x} / (4x)2  = 16 * (1/2) =  8
hence a = 8
Regards
Arun (askIITians forum expert)

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