Euler's identity

IB Mathematics HL & SL: Euler's identity

Although time for teaching Maths HL is very precious and a teacher should endeavour to not use up valuable class time for unnecessary topics and activities, I do feel strongly that Maths HL students should (and deserve to) be exposed to proofs and/or demonstrations of statements and results that are too often used without any justification.For example, the following statement relating the Cartesian, modulus-argument...

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