docs: add missing parentheses in asin formula.

* doc/r5rs/r5rs.texi (Numerical operations): Add parentheses
around argument to sqrt.

diff --git a/doc/r5rs/r5rs.texi b/doc/r5rs/r5rs.texi
index 1c3df60..b7722c1 100644 (file)
--- a/doc/r5rs/r5rs.texi
+++ b/doc/r5rs/r5rs.texi
@@ -4446,7 +4446,7 @@ With log defined this way, the values of sin^-1 z, cos^-1 z,
 and tan^-1 z are according to the following formulae:
 
 
-@center sin^-1 z = -i log (i z + sqrt1 - z^2)
+@center sin^-1 z = -i log (i z + sqrt(1 - z^2))