Texas Instruments TMS320C2x, User Manual

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acos
7-22
Arc Cosine
acos
Syntax #include <math.h>
double acos (double x);
Defined in acos.c in rts.src
Description The acos function returns the arc cosine of a floating-point argument x, which
must be in the range [
− 1,1]. The return value is an angle in the range [0,
π
]
radians.
Example
double realval, radians;
realval = 0.0;
radians = acos(realval); /* acos return
π
/2 */
return (radians);
Convert Internal Time to String
asctime
Syntax #include <time.h>
char * asctime (const struct tm * timeptr);
Defined in asctime.c in rts.src
Description The asctime function converts a broken-down time into a string with the
following form:
Mon Jan 11 11:18:36 1988 \n\0
The function returns a pointer to the converted string.
For more information about the functions and types that the time.h header
declares and defines, see section 7.2.12,
Time Functions , on page 7-11.
Arc Sine
asin
Syntax #include <math.h>
double asin (double x);
Defined in asin.c in rts.src
Description The asin function returns the arc sine of a floating-point argument x, which
must be in the range [
− 1,1]. The return value is an angle in the range [ −
π
/2,
π
/2]
radians.
Example
double realval, radians;
realval = 1.0;
radians = asin(realval); /* asin returns
π
/2 */