Question 1 4 marks Paper 1 Section A Easy No calculator Free
Maximum mark: 4
Find the values of \( x \) for which the vectors \( \begin{pmatrix} 1 \\ 2\cos x \\ 0 \end{pmatrix} \) and \( \begin{pmatrix} -1 \\ 2\sin x \\ 1 \end{pmatrix} \) are perpendicular, \( 0 \leq x \leq \frac{\pi}{2} \).
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