NAME

acos, dacos − Fortran arccosine intrinsic function

SYNOPSIS

real r1, r2
double precision dp1, dp2

r2 = acos(r1)

dp2 = dacos(dp1)
dp2 = acos(dp1)

DESCRIPTION

acos returns the real arccosine of its real argument.  dacos returns the double-precision arccosine of its double-precision argument.  The generic form acos may be used with impunity as its argument will determine the type of the returned value. 

SEE ALSO

trig(3M). 

CX/UX Hf77 Fortran Reference Manual