tgmath.h complex functions:

  carg		complex argument (angle)
  cimag		imaginary part
  conj		complex conjugate
  cproj		projection onto Riemann sphere
  creal		real part

tgmath.h real functions:

  acos          arc cosine
  acosh         inverse hyperbolic cosine
  asin          arc sine
  asinh         inverse hyperbolic sine
  atan          two-quadrant arctangent
  atan2         four-quadrant arctangent, atan2(y,x) ~= atan(y/x)
  atanh         inverse hyperbolic tangent
  cbrt          cube root
  ceil          ceiling
  copysign      copy sign of a number
  cos           cosine
  cosh          hyperbolic cosine
  erf           error function
  erfc          complementary error function
  exp           exponential
  exp2          base-2 exponential
  expm1         exponential minus 1, expm1(x) == exp(x) - 1
  fabs          absolute value
  fdim          positive difference
  floor         floor
  fma           floating-point multiply and add
  fmax          maximum of two values
  fmin          minimum of two values
  fmod          mod, x%y == fmod(x,y)
  frexp         extract fraction and exponent, f = frexp(x,&e)
  hypot         Euclidean distance
  ilogb         extract exponent
  ldexp         ldexp(x,e) produces x * (2**e)
  lgamma        log gamma function
  llrint        round to nearest integer
  llround       round to nearest integer
  log           natural logarithm
  log10         base 10 logarithm
  log1p         logarithm of 1 plus argument, log1p(x) == log(1+x)
  log2          base 2 logarithm
  logb          extract exponent
  lrint         round to nearest integer
  lround        round to nearest integer
  nearbyint     round to nearest integer
  nextafter     nextafter(x,y) == next value following x in the direction of y
  nexttoward    nexttoward(x,y) == next value following x in the direction of y
  pow           exponentiation, x**y == pow(x,y)
  remainder     remainder(x,y) == remainder of dividing x by y
  remquo        remainder and part of quotient
  rint          round to nearest integer
  round         round to nearest integer
  scalbln       scalbln(x,e) produces x * (FLT_RADIX**e)
  scalbn        scalbn(x,e) produces x * (FLT_RADIX**e)
  sin           sine
  sinh          hyperbolic sine
  sqrt          square root
  tan           tangent
  tanh          hyperbolic tangent
  tgamma        gamma function
  trunc         round to integer, towards zero