\approxThe symbol \approx is used to denote approximation, indicating that two quantities are approximately equal. It is often used in mathematics to show that a number or expression is close to another value, but not exactly equal. This relation is useful in various fields such as numerical analysis, physics, and engineering, where exact values are either unknown or unnecessary.
The value of pi is approximately 3.14.
\pi \approx 3.14The exponential function is approximated by its Taylor series for small values of x.
e^x \approx 1 + x + \frac{x^2}{2} \text{ for small } xThe sine of an angle is approximately equal to the angle itself when the angle is small (in radians).
\sin(\theta) \approx \theta \text{ for small } \theta