Vectors questions (1 Viewer)

R0L13D

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The question says that can take two positions for each value of .

Consider the diagram for the specific case that . Can you see why there can only be one location for ?

It's not unusual for more challenging questions in Maths exams for there to be a difficult-to-get mark that requires some detail to be recognised and addressed.

As a simple example, suppose that solving was a 3 mark question:
  • getting to could be worth 1 mark
  • translating that to or could be the second mark
  • recognising that is excluded (as the original fraction was undefined) and thus the answer is or , could be the final mark
is it because if a was equal to pi/2, it would have perpendicular sides but from the diagram, it clearly doesnt?
 

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