LaTeX Theta (θ) - 完整指南
The Greek letter theta (θ/Θ) is one of the most commonly used Greek letters, representing angles in mathematics and physics.
Symbol Preview
Theta
LaTeX Code
No package required
\thetaLowercase theta symbol
No package required
\ThetaUppercase theta symbol
Requires: \usepackage{cmd.package}
\varthetaAlternative theta symbol
目录
LaTeX Theta 是什么?
Theta is the eighth letter of the Greek alphabet. It is extensively used in mathematics and physics to represent angles, particularly in trigonometry, polar coordinates, and rotations. The uppercase form Θ is also used in computer science (big-O notation) and mathematics.
如何在 LaTeX 中使用 Theta
方法 1:使用 \theta
✅无需额外包
Lowercase theta symbol
示例:使用 \theta
\documentclass{article}
\begin{document}
% Using the Theta
Text with \theta
\end{document}方法 2:使用 \Theta
✅无需额外包
Uppercase theta symbol
示例:使用 \Theta
\documentclass{article}
\begin{document}
% Using the Theta
Text with \Theta
\end{document}方法 3:使用 \vartheta
⚠️所需包:
\usepackage{cmd.package}Alternative theta symbol
示例:使用 \vartheta
\documentclass{article}
\usepackage{amssymb}
\begin{document}
% Using the Theta
Text with \vartheta
\end{document}常见用途
Theta 符号通常用于以下情况:
Angle in Trigonometry
Most common use for representing angles.
Code
The sine function: $\sin(\theta)$Output
The sine function: sin(θ)
Polar Coordinates
Used for the angular coordinate.
Code
In polar coordinates: $(r, \theta)$Output
In polar coordinates: (r, θ)
Rotation Angle
Represents rotation angles in geometry and physics.
Code
Rotation matrix for angle $\theta$Output
Rotation matrix for angle θ
完整示例
Trigonometric Functions
Using theta in trigonometry
\documentclass{article}
\begin{document}
The trigonometric functions are:
$\sin(\theta)$, $\cos(\theta)$, and $\tan(\theta)$.
\end{document}Polar Coordinates
Theta in polar coordinate conversion
\documentclass{article}
\begin{document}
Converting from polar to Cartesian:
$x = r\cos(\theta)$
$y = r\sin(\theta)$
\end{document}常见问题
我应该使用哪种方法?
我们建议使用上面标记为"推荐"的方法。但是,最佳方法取决于您的具体需求:
- \theta: Lowercase theta symbol
- \Theta: Uppercase theta symbol
- \vartheta: Alternative theta symbol
我在哪里使用这个符号?
该符号可以用于:
- 在数学方程式中(数学模式)
- 在常规文本中(如果使用文本模式)
- 在各种文档环境中
我可以在显示模式中使用这个吗?
是的,在数学模式($ $)中工作的符号也适用于显示模式($$ $$)。这允许您在自己的行上显示符号,具有更大的格式。
🔗 Related Symbols You May Need
View all symbols →🎯 Need to Convert PDF to LaTeX?
Our free PDF to LaTeX converter preserves all mathematical symbols and formatting.
✓ Fast & accurate
✓ Preserves symbols
✓ Free online
✓ No registration