Answer: option a.
Step-by-step explanation:
In polar coordinates we have that:
x = r*cos( θ)
y = r*sin( θ)
we know that x = 4 and y = 4. now let's analyze the options:
a) x = 4√2*cos(45°) = 4 nice.
y = -4√2*sin(225°) = 4 nice
Option a is correct
b) x = 4√2*cos(315°) = 4 nice
y = -4√2*sin(135°) = -4 incorrect
option b is not correct
c) x = 4√2*cos(135°) = -4 incorrect
Option c is not correct
d) x = 4√2*cos(225°) = -4 incorrect
option d is not correct
Answer:
C. ![y=x-3](https://tex.z-dn.net/?f=y%3Dx-3)
Step-by-step explanation:
To find the answer to the problem, you plug in the values for
and
.
Let's plug them in and see which equation is true.
---------------------------------------------
![-1=2(2)-1\\-1=4-1\\-1=3](https://tex.z-dn.net/?f=-1%3D2%282%29-1%5C%5C-1%3D4-1%5C%5C-1%3D3)
Not true.
---------------------------------------------
![-1=2+3\\-1=5](https://tex.z-dn.net/?f=-1%3D2%2B3%5C%5C-1%3D5)
Not true.
---------------------------------------------
![-1=2-3\\-1=-1](https://tex.z-dn.net/?f=-1%3D2-3%5C%5C-1%3D-1)
True.
---------------------------------------------
![-1=-2(2)-1\\-1=-4-1\\-1=-5](https://tex.z-dn.net/?f=-1%3D-2%282%29-1%5C%5C-1%3D-4-1%5C%5C-1%3D-5)
Not true.
---------------------------------------------
The answer to this question is A
Answer:
-8.88888888889.............