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-rw-r--r--doc/mpfr.texi4
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/mpfr.texi b/doc/mpfr.texi
index a669adfef..588f91c1d 100644
--- a/doc/mpfr.texi
+++ b/doc/mpfr.texi
@@ -2339,8 +2339,8 @@ degrees.
@deftypefun int mpfr_acospi (mpfr_t @var{rop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
@deftypefunx int mpfr_asinpi (mpfr_t @var{rop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
-@deftypefunx int mpfr_atnnpi (mpfr_t @var{rop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
-Set @var{rop} to @code{acos(op)} (resp.@: @code{asin(op)} and @code{atnn(op)})
+@deftypefunx int mpfr_atanpi (mpfr_t @var{rop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
+Set @var{rop} to @code{acos(op)} (resp.@: @code{asin(op)} and @code{atan(op)})
divided by @m{\pi,Pi}.
@end deftypefun