Ok

The question is

' Functions with the property demonstrated by part 1) have a special name in mathematics, what is it?'

Part 1 is where I multiply various sines and cosines together ex:

sinxcosx, cosxcosy, sinxsiny to put it frankly random configurations of sin and cos values for which i had a table of

The answers i got were all approximately 0 (all very close to zero)

so the question im asking would be what are those numbers called when multiplied and summed up approximate to 0?

Thanks

This is final year automotive engineering shit by the way

knock yaselves out