Zilog Z8F0130 - Manual (Page 446)

Appendix B. C Standard Library UM013037-1212
422
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expression errno acquires the value of the ERANGE macro. If the result underflows (the
magnitude of the result is so small that it cannot be represented in an object of the speci-
fied type), the function returns zero.
Functions
The following sections list and briefly describe the mathematics functions:
•
Trigonometric – see page 422
•
Hyperbolic – see page 422
•
Exponential and Logarithmic – see page 422
•
Power – see page 423
•
Nearest Integer – see page 423
Trigonometric
Hyperbolic
Exponential and Logarithmic
double acos(double x); Calculates arc cosine of x.
double asin(double x) Calculates arc sine of x.
double atan(double x); Calculates arc tangent of x.
double atan2(double y, double x); Calculates arc tangent of y/x.
double cos(double x); Calculates cosine of x.
double sin(double x); Calculates sine of x.
double tan(double x); Calculates tangent of x.
double cosh(double x); Calculates hyperbolic cosine of x.
double sinh(double x); Calculates hyperbolic sine of x.
double tanh(double x); Calculates hyperbolic tangent of x.
double exp(double x); Calculates exponential function of x.
double frexp(double value, int
*exp); Shows x as product of mantissa (the value returned
by frexp) and 2 to the n.
double ldexp(double x, int exp); Calculates x times 2 to the exp.
double log(double x); Calculates natural logarithm of x.