Mikroelektronika MIKROE-350 Fiche De Données

486

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub function atan(dim arg as real) as real

The function computes the arc tangent of parameter arg; that is, the value
whose tangent is arg. The return value is in radians, between -

Π

/2 and 

Π

/2

(inclusive).

sub function atan2(dim y as real, dim x as real) as 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 -

Π 

and 

Π

(inclusive).

sub function ceil(dim x as real) as real

Description The function returns value of parameter 

x

rounded up to the next whole number.

sub function cos(dim arg as real) as real

Description The function returns the cosine of 

arg

in radians. The return value is from -1 to 1.

sub function cosh(dim x as real) as 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.

sub function eval_poly(dim x as real, dim byref d as array[10] of
real, dim n as integer) as real

Function Calculates polynom for number 

x

, with coefficients stored in 

d[]

, for

degree 

n.