aiii) How long does it take for the airplane to reach A? Got this one, too.
At A the airplane changes direction so it now flies towards B. The angle between the original direction and the new direction is theta as shown in a second diagram. This diagram also shows the point Y, between A and B, where the airplane comes closest to X.
b) Use the scalar product of two vectors to find the value of theta in degrees. I'm guessing that I should use the vectors OA and AB but I don't know how I'd actually carry that out.
ci) Write down the vector AX
cii) Show that the vector n
= <-3, 4> is perpendicular to AB
. I think I know how to do this one.
cii) Calculate the distance XY. ???
d) How far is the airplane from A when it reaches Y? I guess I need to know some of the previous answers to get this one!