The Fourier cosine series of a function is given by: f(x) = \sum ↙\stackrel{\infty}{n = 0}f_{n}\cos ⁡nx For f(x) = cos 4 x, the numerical value of (f 4 + f 5 ) is _______. (round off to three decimal places)

GATE Civil Engineering (CE) 2022 Shift 1 Solved Paper

Question : 30 of 65

Marks: +1, -0

The Fourier cosine series of a function is given by:

f(x) = ∑ ↙{n = 0}↖{∞}f_{n}\cos ⁡nx

For f(x) = cos⁴ x, the numerical value of (f₄ + f₅) is _______. (round off to three decimal places)

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