# Objective

is to represent bold text or symbol in LaTeX.

## Example 1. Bold Text

### Code

Hello! Welcome to the \textbf{Study Astrophysics}.

### Result

## Example 2. Bold inside an equation

### Code

\mathbf{A} \cdot \mathbf{B} \equiv AB \cos\theta

### Result

## Example 3. Bold Symbol

### Code

\boldsymbol{\lambda}

### Result

## Reference

https://www.sharelatex.com/learn/Bold,_italics_and_underlining http://study-astrophysics.com/griffiths-01-01/