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Annotation of researchv10dc/630/man/src/p_man/man3/trig.3m, revision 1.1.1.1

1.1       root        1: .\"#ident      "@(#)ccsman:g3m/trig.3m 1.2"
                      2: .ds x} TRIG 3M "630 MTG" "\&"
                      3: .TH \*(x}
                      4: .SH NAME
                      5: trig: sin, cos, tan, asin, acos, atan, atan2 \- trigonometric functions
                      6: .SH SYNOPSIS
                      7: .B #include <ccs/math.h>
                      8: .PP
                      9: .B double sin (x)
                     10: .br
                     11: .B double x;
                     12: .PP
                     13: .B double cos (x)
                     14: .br
                     15: .B double x;
                     16: .PP
                     17: .B double tan (x)
                     18: .br
                     19: .B double x;
                     20: .PP
                     21: .B double asin (x)
                     22: .br
                     23: .B double x;
                     24: .PP
                     25: .B double acos (x)
                     26: .br
                     27: .B double x;
                     28: .PP
                     29: .B double atan (x)
                     30: .br
                     31: .B double x;
                     32: .PP
                     33: .B double atan2 (y, x)
                     34: .br
                     35: .B double y, x;
                     36: .SH DESCRIPTION
                     37: .IR Sin ,
                     38: .I cos\^
                     39: and
                     40: .I tan\^
                     41: return respectively the sine, cosine and tangent of their argument,
                     42: .IR x ,
                     43: measured in radians.
                     44: .PP
                     45: .I Asin\^
                     46: returns the arcsine of
                     47: .IR x ,
                     48: in the range \-\(*p/2 to \(*p/2.
                     49: .PP
                     50: .I Acos\^
                     51: returns the arccosine of
                     52: .IR x ,
                     53: in the range 0 to \(*p.
                     54: .PP
                     55: .I Atan\^
                     56: returns the arctangent of
                     57: .IR x ,
                     58: in the range \-\(*p/2 to \(*p/2.
                     59: .PP
                     60: .I Atan2\^
                     61: returns the arctangent of
                     62: .IR y / x ,
                     63: in the range \-\(*p to \(*p,
                     64: using the signs of both arguments
                     65: to determine the quadrant of the return value.
                     66: .SH SEE ALSO
                     67: matherr(3M).
                     68: .SH DIAGNOSTICS
                     69: .IR Sin ,
                     70: .IR cos ,
                     71: and
                     72: .I tan\^
                     73: lose accuracy when their argument is far from zero.
                     74: For arguments sufficiently large,
                     75: these functions return zero when there would
                     76: otherwise be a complete loss of significance.
                     77: In this case, a message indicating \s-1TLOSS\s+1 error is 
                     78: displayed.
                     79: For less extreme arguments causing partial loss of significance,
                     80: a \s-1PLOSS\s+1 error is generated but no message is displayed.
                     81: In both cases,
                     82: .I errno\^
                     83: is set to
                     84: .SM
                     85: .B ERANGE.
                     86: .bp
                     87: .PP
                     88: If the magnitude of the argument of
                     89: .IR asin " or " acos
                     90: is greater than one,
                     91: or if both arguments of
                     92: .I atan2\^
                     93: are zero,
                     94: zero is returned and
                     95: .I errno\^
                     96: is set to
                     97: .SM
                     98: .BR EDOM .
                     99: In addition, a message indicating \s-1DOMAIN\s+1 error is
                    100: displayed.
                    101: .PP
                    102: These error-handling procedures may be changed with the function
                    103: .IR matherr (3M).

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