4 ms·

The answer to Cos(1.57079632) (in radians) will give you a clue as to how your calculator does it. See here [0] [0] https://www.reddit.com/r/calculators/comme

• the_third_wave 3y ago
  Quite well when you realise this comes down to cos(π/2) to which the thing answers correctly: cos(π/2) = 0. Using HiPER Calc on Android
  • dm319 3y ago
    The number is deliberately close but not the same as pi/2. See here: https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv017.cgi?read=123814 https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv017.c... And you can compare to wolfram alphas result.
• aidenn0 3y ago
  6.7948900e-9 which has only the first 5 digits correct (if you assume it would have to have been 6.79490 to get 6 digits correct since that is what the correct value rounds to)