How Do I Get the Theta Sign on My TI-84?

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The TI-84 is a graphing calculator that is made by TI, or Texas Instruments. The TI-84 comes in two versions, the Plus and the Plus Silver. Released in 2004, it is faster and has a higher contrast screen than the TI-83 Plus. The "θ" is a lower-case Greek letter. In mathematics, the theta -- or "θ" -- is frequently used as a variable to represent an angle. It is used in trigonometry and with polar coordinates.

  • Enter any characters in the expression that will be before the "θ."

  • Press the "ALPHA" key.

  • Press the "3" key. The "θ" will now be displayed.

  • Enter any remaining characters to complete the expression.

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