D. Slightly acidic is 5.0 to 5.5
Answer:
I think it is C but can't be sure because B isn't clear.
Step-by-step explanation:
Answer:
(- 1/2 , √3/2)
Step-by-step explanation:
t=20π/3
t' = 20π/3 - 6π = 2π/3 (120°) ... 2nd quadrant
If we start from (1,0) of unit circle, the coordinate of terminal point (x,y)
OF/OE = - cos 60° = x / 1 = - 1/2
FE/OE = sin 60° = y/1 = √3/2
First Column, -x and 5 third column, -x and 2
What do you need help with?