> windows/osx calculators do not support this First of all, the default OS X and Windows calculators both do support this feature. But that’s not really the ea

> windows/osx calculators do not support this First of all, the default OS X and Windows calculators both do support this feature. But that’s not really the easy way to approach this type of problem. On OS X, first do command-space (to bring up the floating “spotlight” bar), then type e.g. atan(1), and it reveals the answer rounded to 10 digits, 0.7853981634 To get 20 digits, open up a terminal window, and type: bc -l <<< "a(1)" Or use your favorite scripting language... > Google for web calculator, nothing Type atan(1) into google and it prints the answer. Or open up the JavaScript console on this forum page (or any other web page) and type Math.atan(1) to get the answer to 16 digits 0.7853981633974483 Alternately, try https://www.wolframalpha.com/ https://www.wolframalpha.com/ for more complicated calculations. > default desktop [calculator] applications Imitating the buttons of a handheld electronic calculator on a computer with a full keyboard is anachronistic and cumbersome. Stop using those, even when they do include the specific functions you want.