How to convert matlab script code containing cosine and sine terms in VHDL code?

Hi,

I have Simulink model in which I have written a Matlab function script. The script contains cosine and sine terms. I want to convert this script in VHDL but as expected, HDL coder is giving me an error regarding cosine and sine terms. Anyone has a solution that how to modify the script so that HDL code can be generated? or how to generate the code with cosine and sine term included?