Hello: Here is a bit of R-code:
> mvr [1] 2.2658 > (sin(.Last.value)+sin(2*.Last.value)) [1] -0.2156507 > acos((-sqrt(17)-1)/8) [1] 2.2658 > (sin(.Last.value)+sin(2*.Last.value)) [1] 1.76745 > (sin(mvr)+sin(2*mvr)) [1] -0.2156507 > Note that my variable mvr is the value of acos((-sqrt(17)-1)/8). However, if I use .Last.value after invoking the acos function in a further calculation, I get a nonsensical result. What is going on? I am running R version 4.0.0 (2020-04-24) on an iMac, operating system MacOS 11.4 “Big Sur”. Mik Bickis ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.