...he TI-83 family, TI-84 Plus family, or TI-Nspire handheld in TI-84 Plus mode only supports single letter alphabetical characters (A-Z) as programming variables. There is not a way to add the Greek symbols to the list. Greek symbols will have to be replaced with a letter (A-Z) so the calculator ca... https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/13660
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