0580/23 May/Jun 2021, Question 14: Magnitude of a Vector
Cambridge IGCSE Mathematics 0580 · Paper 23 (Extended) · Calculator · 3 marks
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The question, in short
A column vector (20, k) has magnitude 29; find the value of k.
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Solution · 3 marks
- 120² + k² = 29²
- 2k² = 841 − 400 = 441
- 3k = ±21
Answer±21
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