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1.1 ! root 1: .so tmac.ilib ! 2: .TH TRIG 3.icon "The University of Arizona \- 8/12/84" ! 3: .SH NAME ! 4: sin, cos, tan, asin, acos, atan, atan2, dtor, rtod \- trigonometric functions ! 5: .SH SYNOPSIS ! 6: .nf ! 7: .sp ! 8: \*Msin(x)\fR ! 9: \*Mcos(x)\fR ! 10: \*Mtan(x)\fR ! 11: \*Masin(x)\fR ! 12: \*Macos(x)\fR ! 13: \*Matan(x)\fR ! 14: \*Matan2(x,\*by)\fR ! 15: \*Mdtor(x)\fR ! 16: \*Mrtod(x)\fR ! 17: .fi ! 18: .SH DESCRIPTION ! 19: \*Msin\fR, \*Mcos\fR, and \*Mtan\fR return trigonometric functions of ! 20: radian arguments. The magnitude of the argument should be checked by ! 21: the caller to make sure that the result is meaningful. ! 22: .LP ! 23: \*Masin\fR returns the arc sin in the range \-\(*p/2 to \(*p/2. ! 24: .LP ! 25: \*Macos\fR returns the arc cosine in the range 0 to \(*p. ! 26: .LP ! 27: \*Matan\fR returns the arc tangent in the range \-\(*p/2 to \(*p/2. ! 28: .LP ! 29: \*Matan2\fR returns the tangent of \*Mx\fR/\*My\fR in the range \-\(*p to \(*p. ! 30: .LP ! 31: \*Mdtor\fR converts degrees to radians, while \*Mrtod\fR converts radians ! 32: to degrees. ! 33: .LP ! 34: The C math library (\*M\-lm\fR) must be loaded with these functions. ! 35: .SH DIAGNOSTICS ! 36: Run-time error 251 occurs if the magnitude of the argument to \*Masin\fR or \*Macos\fR ! 37: is greater than 1. ! 38: .LP ! 39: Run-time error 252 occurs for the singular points of \*Mtan\fR. ! 40: .SH BUGS ! 41: The value of \*Mtan\fR for arguments greater than about 2\u\s-2\&31\s0\d ! 42: is garbage. ! 43: .SH SEE ALSO ! 44: sin(3m) ! 45: .SH AUTHORS ! 46: Ralph E. Griswold and Stephen B. Wampler
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