This is fron R-2.5.0-to-be, windows XP
The following excerpt from ?asin cannot be right:
For asin() and acos(), there are two cuts, both along the real axis: *(-Inf,
1]* and *[1, Inf)*. Functions asin() and acos() are continuous from above on
the interval *(-Inf, -1]* and continuous from below on *[1, Inf)*.
Note the first interval should be (-Inf, -1) not (-Inf, 1)
Kjetil
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