Some backstory. I do architecture at university. This year we were asked to do a load of maths for our tech side which wasn't fully explained to us (I was in every lecture and did check the notes).
Anyway, I have to retake tech this year as whilst my classmates mostly blagged the information and still passed, I was honest and said i didn't fully understand and I failed.
TO THE POINT! Does anyone know how to do this maths and can they explain it to me? (taken from an example paper a few years ago):
Thank you for helping in advance if you do! ^^