Mikroelektronika MIKROE-742 데이터 시트

493

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

function atan(arg : real) : real;

The function computes the arc tangent of parameter arg; that is, the value whose tan-
gent is arg. The return value is in radians, between -đ/2 and đ/2 (inclusive).

function atan2(y : real; x : real) : real;

This is the two-argument arc tangent function. It is similar to computing the arc
tangent of y/x, except that the signs of both arguments are used to determine
the quadrant of the result and x is permitted to be zero. The return value is in
radians, between -đ and đ (inclusive).

function ceil(x : real) : real;

Description The function returns value of parameter x rounded up to the next whole number.

function cos(arg : real) : real;

Description The function returns the cosine of arg in radians. The return value is from -1 to 1.

function cosh(x : real) : real;

The function returns the hyperbolic cosine of x, defined mathematically as
(ex+e-x)/2. If the value of x is too large (if overflow occurs), the function fails.

function eval_poly(x : real; var d : array[10] of real; n : inte-
ger) : real;

Function Calculates polynom for number x, with coefficients stored in d[], for
degree 

n

.

function exp(x : real) : real;

The function returns the value of e — the base of natural logarithms — raised to
the power x (i.e. ex).