How do you find the value for $arctan(-1)$ ?

Question

2144 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-05-25T22:03:57

Arctan (-1) -> tan x = -1 . Find x?

Trig table gives -> $x = (3pi)/4 = 135 deg$

Reminder. Trigonometry is a science that studies the variation of an "arc", not an angle. This is why the word "Arctan" comes from.

How do you find the value for arctan(-1)arctan(-1)?