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3 marksAngle Between Two Vectors

CSEC Additional Mathematics · 2015 · Paper 2 · Question 3(b)(ii)

The position vectors of two points, A and B, relative to an origin O, are such that OA = 3i - 2j and OB = 5i - 7j.

Determine the acute angle AOB, in degrees, to one decimal place.

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Other parts of this question

  1. 3(a)(i)Determine the coordinates of the centre of the circle.[2 marks]
  2. 3(a)(ii)Find the length of the radius.[1 mark]
  3. 3(a)(iii)Determine the equation of the normal to the circle at the point (4, 10).[3 marks]
  4. 3(b)(i)Determine the unit vector AB.[3 marks]

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