#### Summing a Trigonometric Series

We can sum many trigonometric series using complex number, specicifically the exponential form. \[e^{i \theta}= cos \theta +i sin \theta\] (De Moivre's Theorem) The ral part of \[e^{i \theta}\] is \[cos atheta\] and the imaginary part is \[sin \theta\]...

https://astarmathsandphysics.com/ib-maths-notes/sequences-and-series/4952-summing-a-trigonometric-series.html#### Symbols and Notation

-the set of positive integers and zero –x is greater than y is greater than –x is less than y x >=y – x is greater than or equal to y -the set of integers, -the set of positive integers, -the set of rational numbers -the set of positive rational...

https://astarmathsandphysics.com/igcse-maths-notes/532-symbols-and-notation.html

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