I would convert to degrees first seems to make it easier.

×

= -468
by adding 360 twice we get the coterminal angle 252
252 is in the 3rd quadrant so 180 is the closest angle on the x-axis
ref angle = 252 - 180 = 72
If necessary convert back to radians...
Answer:
x² - 2x - 2
By Completing the Square....
x² - 2x + 1² - 2 - 1²
(x - 1)² - 3 .....
Hope it helps.
Answer:
D, irrational numbers,
Step-by-step explanation:
75 is part of all groups except irrational numbers, it is an integer, a whole number and a natural number..