Obviously literally none of the commenters have ever even picked up an engineering text, let alone possessed the mathematical ability to evaluate such a textbook - if they did they would immediately recognize how virtually every engineering textbook uses 'engineer math' which is a straight-to-the-point 'memorize-this-formula-and-use-it' approach (what mathematicians and physicists would jokingly call - dumbed down or regurgitation mathematics) because that's the purpose of engineering, to apply formula's to build things etc..., not rigorously derive and justify them all as one would do in a mathematics course, or examine the applications of such formulas in sometimes excruciating detail as one does in physics. The idea of rigorous derivations in engineering serves literally only to put people off the subject and waste time. Given that there is plenty of evidence of unconscious bias leading to a disproportionate number of males over females in math and physics compared to the rest of the sciences, introducing the rigor of those subjects into engineering (when it is not even necessary) has the unintended action of putting people off (for whatever reason, unconscious bias or whatever) the subject. But of course you all prefer to get triggered based on your own ignorance of the topic under discussion, congratulations.