# Inserting the Greek Letter Theta in GeoGebra

Welcome to our tutorial on seamlessly integrating the Greek letter theta θ into GeoGebra.

For typing the lowercase theta symbol (θ) in GeoGebra, simply press **ALT+T** on your keyboard. To get the uppercase version (Θ), the combination is **ALT+SHIFT+T**.

Upon pressing the **ALT+T** shortcut, θ appears and becomes ready for use as any variable in GeoGebra.

Next, type the equals sign "=" followed by the desired value. For instance, setting θ=1 by typing θ=1.

Similarly, the **ALT+SHIFT+T** command brings up the uppercase theta letter.

Follow this by entering the equals sign "=" and assigning it a value as needed.

These intuitive keyboard shortcuts facilitate the rapid insertion of Greek symbols and other special characters in GeoGebra, compatible across Windows, Linux, and Mac operating systems.

It's important to note that in GeoGebra, the theta symbol θ is more than a visual element. It's recognized as a legitimate symbol that can be employed as a variable for value storage or in mathematical computations.

For instance, the variable θ=1 can be used to calculate the sine of theta, yielding **sin(θ)=sin(1)=0.84**.

### Using the Theta Symbol Without an Assigned Value

Entering θ and pressing enter without assigning a value prompts GeoGebra to automatically create a parametric curve, specifically **a=Curve((θ; θ),θ,0,2 π)**.

This showcases another versatile application of the θ symbol in GeoGebra.

Here, **(θ; θ) represent the curve's parametric coordinates**, where θ is used as both the x and y coordinates, forming a curve on the plane.

In this function, **θ varies from 0 to 2π (two pi)**, encompassing a complete range of angles in radians.

This formula, in essence, creates a curve based on the varying angle θ, ranging from 0 to 360 degrees (or 2π radians).

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