MedCalcCOSINTEGRAL function
Description
COSINTEGRAL(x) returns the value of the cosine integral function of x. The cosine integral function is defined as:
$$ {\rm Ci}(x) = \gamma + \ln x + \int_0^x\frac{\cos t-1}{t}\,dt $$
$$ {\rm Ci}(x) = \gamma + \ln x + \int_0^x\frac{\cos t-1}{t}\,dt $$
where γ = 0.57721566490153 (Euler-Mascheroni constant).
The argument x can be a real number or a matrix. When it is a matrix, the function returns a matrix with the same dimensions and with the COSINTEGRAL function applied to all elements.
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