Ballistics calculation of side wind
Dividing a clock face up into minutes, each minute = 6° of angle. As we are using the opposite angle to that in the video use Sin.
In this example, if the wind is 15 mph the side wind effect would be 7.5 mph or 11 fps
i would say that unless this person has some type of claim to your calculator, it should be none of their concern. i for one would like to see this addition to what you've shared already...but this is your decision to make.
The only claim they could make is having a formula for how these basic calculations translate to the effect in WGT.