element-wise cosine function, argument in degree
y=cosd(x)
:x real vector/matrix :
For a vector or a matrix x of angles given in degree, cosd(x) is the cosine of its elements. The results are in [-1 1]. For input elements which are equal to n*90 with n integer and odd, the result is exactly zero.
x=[0,30 45 60 90 360];
cosd(x)