The subject wants to ask, "Can math.h be used in fixed-point C programs?" Of course. According to the published information about the query, these functions need to be used in fixed-point C programs. You can include the math.h header file at the beginning of the code and call the function directly. Math.h is a header file in the C standard library, which provides many prototypes and constant definitions of mathematical functions, including common trigonometric functions, exponential functions, logarithmic functions, hyperbolic functions, power functions and so on.