The FORCOS(x,x0,ω,a0,…,an) function evaluates a Fourier cosine series.
Format
FORCOS (x, x0, ω, a0,…,an)
Arguments
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x
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The independent variable. You can enter a valid expression for the independent variable such as 2*TIME.
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x0
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The constant offset of the independent variable.
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ω
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The fundamental frequency of the series in radians per unit of the independent variable. Append a D to the value to specify the frequency in degrees per unit of the independent variable.
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a0,…,an
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A set of real variables specifying an nth order Fourier series for n<30. You can define up to a 31 coefficients.
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Function Definition
FORCOS(x,x0,ω,a0,…,an) =
a0 + Σj=1 … n aj*Tj(x-x0)
where
Tj(x-x0) = cos{j*ω*(x-x0))