Chapter 11: Problem 5
Solve the quadratic equation \(5 x^{2}-11 x+13=0\)
Chapter 11: Problem 5
Solve the quadratic equation \(5 x^{2}-11 x+13=0\)
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Get started for freeIf \(z=4 \angle \frac{\pi}{6}\) find \(z^{6}\) in polar form.
With the help of a calculator find (a) \(\sqrt{7}\), (b) \(\sqrt{-7}\), (c) \(\sqrt{5.32}\), (d) \(\sqrt{-5.32}\)
\(2 \quad\) Express \(z=2+2 \mathrm{j}\) in polar form and hence find \(z^{8}\), leaving your answer in polar form. Deduce that \((2+2 \mathrm{j})^{8}=4096\)
Express \(z=-3+2 \mathrm{j}\) in polar form and hence find \(z^{6}\), converting your answer into cartesian form.
Express \(\sin \omega t\) in terms of exponential trigonometrical functions: (a) \(\mathrm{e}^{\mathrm{j} \alpha}\) (b) \(\mathrm{e}^{\mathrm{jow} t}\) (c) \(\mathrm{e}^{-\mathrm{jat}}\) functions. where \(\alpha, \omega\) and \(t\) are real.
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