How do you simplify #arc tan 0.3839#?

Question

1658 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-07-11T18:55:26

#21^0#

arctan converts the numeric value back to the angle

By my calculator #arctan0.3839 = 21.001795....#

Assuming this has a processing error implies that

#arctan 0.3839=21^0#
,.....................................................
check: Showing all the numbers on the display of my calculator.

#tan(21^0)~~0.383864035035#

Rounding this to 4 decimal places gives #0.3839#

Thus #21^0# is a reasonable estimate