# Difference between revisions of "P. 403, line -7"

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The equation should be | The equation should be | ||

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<math>\phi = \tan^{-1} \left( \frac{\operatorname{Im} \left( G(i \omega) \right)}{\operatorname{Re} \left( G(i \omega) \right)} \right).</math> | <math>\phi = \tan^{-1} \left( \frac{\operatorname{Im} \left( G(i \omega) \right)}{\operatorname{Re} \left( G(i \omega) \right)} \right).</math> | ||

[[Engineering Differential Equations: Theory and Applications, Springer 2010#Errata|Return to errata.]] | [[Engineering Differential Equations: Theory and Applications, Springer 2010#Errata|Return to errata.]] | ||

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+ | <math>\phi = \cos \frac{x}{2}</math> |