Suppose that vectors A, B and C are related by A-B=C. a) Is it possible that A-B=C? If so, draw the sort of situation when this is so. (A is the magnitude of A, B of B and C of C.) b) Is it possible that C=A+B? If so, then draw the sort of situation when this is so. ------- a) I used the Pythagorean triplet 3,4,5 for this situation. b) I'm not sure but I think the question basically asks whether C can equal A+B and at the same time can C equal the square root of the sum of the squares of A and B. I'm having trouble getting my head around this.