\lnapproxThe symbol \lnapprox is used to denote that two quantities are not approximately equal. It is a negated relation, meaning it expresses the opposite of the approximate equality relation, often represented by \approx. This symbol is useful in mathematical expressions where it is important to specify that two values do not have a close approximation.
Indicates that x is not approximately equal to y.
x \lnapprox yStates that the sum of squares of a and b is not approximately equal to the square of c.
a^2 + b^2 \lnapprox c^2Expresses that the sine of theta is not approximately equal to theta, often used in contexts where small angle approximations are not valid.
\sin(\theta) \lnapprox \theta