tan() — Calculate Tangent
The tan() function calculates the tangent of x, where x is expressed in radians. If x is too large, a partial loss of significance in the result can occur and sets errno to ERANGE.

In C programming, the tan() function is part of the standard library <math.h>, and it is used to calculate the tangent of an angle.

tan() — Calculate Tangent
The tan() function calculates the tangent of x, where x is expressed in radians. If x is too large, a partial loss of significance in the result can occur and sets error to E-RANGE.