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Original document written by: Steve Chamberlain and Roland Pesch.

This documentation has been prepared by Cygnus Technical Publications; contact the Cygnus  Technical Publications staff: doc@cygnus.com. 

The following documentation discusses the C math library functions.
 
• Mathematical functions (math.h)
• acos, acosf

[arc cosine]
• acosh, acoshf

[inverse hyperbolic cosine]
• asin, asinf

[arc sine]
• asinh, asinhf

[inverse hyperbolic sine]
• atan, atanf

[arc tangent]
• atan2, atan2f

[arc tangent of y/x]
• atanh, atanhf

[inverse hyperbolic tangent]
• jN, jNf, yN, yNf

[Bessel functions]
• cbrt, cbrtf

[cube root]
• copysign, copysignf

[sign of y, magnitude of x]
• cosh, coshf

[hyperbolic cosine]
• erf, erff, erfc, erfcf

[error function]
• exp, expf

[exponential]
• expm1, expm1f

[exponential minus 1]
• fabs, fabsf

[absolute value (magnitude)]
• floor, floorf, ceil, ceilf

[floor and ceiling]
• fmod, fmodf

[floating-point remainder (modulo)]
• frexp, frexpf

[split floating-point number]
• gamma, gammaf, lgamma, lgammaf,

gamma_r, gammaf_r, lgamma_r, lgammaf_r
[logarithmic gamma function]
• hypot, hypotf

[distance from origin]
• ilogb, ilogbf

[get exponent of floating point number]
• infinity, infinityf

[representation of infinity]
• isnan, isnanf, isinf, isinff, finite, finitef

[test for exceptional numbers]
• ldexp, ldexpf

[load exponent]
• log, logf

[natural logarithms]
• log10, log10f

[base 10 logarithms]
• log1p, log1pf

[log of 1 + x]
• matherr

[modifiable math error handler]
• modf, modff

[split fractional and integer parts]
• nan, nanf

[representation of infinity]
• nextafter, nextafterf

[get next number]
• pow, powf

[x to the powery]
• rint, rintf, remainder, remainderf

[round and remainder]
• scalbn, scalbnf

[scale by integer]
• sqrt, sqrtf

[positive square root]
• sin, sinf, cos, cosf

[sine or cosine]
• sinh, sinhf

[hyperbolic sine]
• tan, tanf

[tangent]
• tanh, tanhf

[hyperbolic tangent]
• Reentrancy properties of libm

 
• Index