Answer:
I would use Euclid's first axiom:
Step-by-step explanation:
Things that are equal to the same thing are equal to each other.
The equation is "x=0", because the x intercepts at the x axis with no y-intercept.
Answer:-18
-6
0
3
9
-
Evaluate cosπ then inverse tan, that is
cosπ = - 1
(- 1) = -