Section: Mathematical Functions
cos function for its argument. The general
syntax for its use is
y = cos(x)
where x is an n-dimensional array of numerical type.
Integer types are promoted to the double type prior to
calculation of the cos function. Output y is of the
same size and type as the input x, (unless x is an
integer, in which case y is a double type).
cos function is defined for all real
valued arguments x by the infinite summation
For complex valued arguments z, the cosine is computed via
cos(2 pi x)
function over one period of [0,1]:
--> x = linspace(0,1); --> plot(x,cos(2*pi*x)) --> quit