for: double precision elementary functions
also contains mod2pi.c to test range reduction of trig functions
and mtst.c to check consistency of math functions
Some of the functions defined here are also defined in Standard C
or in the widely distribued 4.3BSD math collection:
acos StandardC
acosh 4.3BSD
asin StandardC
asinh 4.3BSD
atan StandardC
atan2 StandardC
atanh 4.3BSD
cbrt 4.3BSD
ceil StandardC
chbevl cephes
cos StandardC
cosh StandardC
cot cephes
drand cephes
exp StandardC
exp10 cephes
fabs StandardC
floor StandardC
frexp StandardC
ldexp StandardC
log StandardC
log10 StandardC
mtherr cephes
p1evl cephes
polevl cephes
pow StandardC
powi cephes
radian cephes
ranwh cephes
round cephes
sin StandardC
sincos cephes
sinh StandardC
sqrt StandardC
tan StandardC
tanh StandardC
Be aware that the tabulated error behavior for
other functions in cephes depends on the quality of these
elementary functions, which is not specified by Standard C.