SPM 2022 Add Maths Paper 1, Question 5Vectors

Solved on video in English and Bahasa Melayu · Form 4, Vectors · 5:07 video

The question

5 The coordinates of points P and Q are (2, 3) and (q, 2q) respectively. Given that vector PQ is a unit vector, use the vector triangle law to find the possible values of q.

SPM 2022 Add Maths Paper 1, Question 5: the question as drawn in Eduly's video5:07

Step 1

Write the position vectors: OP = 2i + 3j and OQ = qi + 2qj.

7 more steps, each with the reason for it, in the full solution

Final answer

q = 2 or q = 6/5

Where students lose marks

Watch out: don't write PQ directly. Show PQ = PO + OQ (the vector triangle law) first, because that working earns marks.

Watch every step of this question solved on video (5:07), with the reason behind each step and a box that checks your own answer.

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