0606 P13 - Nov 2019 - Q4 - 7 marks
8347
It is given that
\(A=\begin{pmatrix}5&2\\4&-1\end{pmatrix}.\)
(i) Find \(A^{-1}\).
(ii) Hence find, in radians, the acute angles \(x\) and \(y\) such that
\(5\tan x+2\tan y=12,\)
\(4\tan x-\tan y=7.\)
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