Neco Model Questions Vol1 2025 Mathematics Question 4
Practice objective / multiple choice question 4 from the 2025 Neco Model Questions Vol1 Mathematics examination.
In a plane, vectors \(\mathbf{a}\) and \(\mathbf{b}\) satisfy \(|\mathbf{a}| = 5\), \(|\mathbf{b}| = 8\), and the vector \(\mathbf{c} = 2\mathbf{a} - \mathbf{b}\) is perpendicular to \(\mathbf{a} + 3\mathbf{b}\). Find the acute angle between \(\mathbf{a}\) and \(\mathbf{b}\) in degrees, rounded to the nearest integer.
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This is Neco Model Questions Vol1 2025 Mathematics Question 4. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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