The mark scheme says 'Out of phase by pi/180 degrees'. I know why the points are out of phase, but why by 'pi/180 degrees'?
Ive done the paper - I found it pretty tough (managed to get that question ^^ I think). Do you have the question where theres that water pump and it asks you to work out the power of the pump? Don't think ill get it back for a while and wanted to have a second go at it