Calling functions in UKismetMathLibrary results in LNK2019 errors

I get LNK2019 unresolved symbol errors whenever I try to call the UKismetMathLibrary::Cos function as well as other UKismetMathLibrary functions like ComposeRotators and Conv_RotatorToVector.

These similar threads found workarounds for their issues.

Do I have to make workarounds for all of my calls to UKismetMathLibrary functions or is there another solution?

So I resolved my errors by copying the source code from the functions directly since most of them were simple wrappers. I am still confused to why Epic doesn’t expose those methods to programs written in C++. It would be nice to have access to some of those methods even though they were written with Blueprints in mind.