<h3>
Answer: 
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Explanation:
The identity we'll use is cos(-x) = cos(x) for any value of x.
So cos(-150) = cos(150).
Then locate the angle 150 on the unit circle. The terminal point is 
The x coordinate of this terminal point is the value of cos(150).
C reflex because it goes over 180 degrees!
Answer:
9
Step-by-step explanation:
3-2i+8=23
5+2i+23
2i=18
i=-9
We know that 1 cm = 400 km
Therefore, 22 cm = x
Cross multiply:
(1)x = (400×22)
x = 8800
I think it's 330 I don't really know