sign function is math matrix function

A function must have a value for any given domain. For each edge (or interval), the sign graph has a sign (+ or -) . So, it is a function.

A function that has a variable under a radical sign.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

All functions in Excel start with the = sign. So you may be mistaking that for two minus signs. A minus sign will have no impact on an TRIM function as it is a text function.

An alternating function is a function in which the interchange of two independent variables changes the sign of the dependent variable.