Question

find exact value of
arctan(-1)

Answer 1

y=arctan(-1)
tany=-1
y=3pi/4

Answer 2

same type of question

Answer 3

but use the CAST rule

Answer 4

okies

Answer 5

tyvm :)

Answer 6

np, gonna sleep

Answer 7

gn sleep well

Answer 8

\[\arctan{x}:\quad\mathbb{R}\rightarrow[-\pi/2,\pi/2]\]\[\Rightarrow\quad\arctan{(-1)}=-\pi/4\]