Question 18 (Textile Engineering & Fibre Science)
The coefficient of in the Fourier Series of the function

(A) | ![]() |
(B) | ![]() |
(C) | ![]() |
(D) | ![]() |
[Show Answer]
Option A is correct
,
By fourier series-
f(x)=
Where,
Similarily-
and
By putting these values in function, we get-
Coefficient of cos 4x is
And all a1,a2,a3,a4….are equal to 0 (Ans)
Option A is correct.