Posted by Jonathan on .
Please check my answers I really need to do my homeowrk!;This are polar coordinates we're studyingI'm almost positive the first two are correct.
1.Which of the folowing is another representation of (3,pi)?
(3,120degree)
(3,0 degree)I think it is this one??
((3,0 degree)
2.Which is not a representation of (5,150 degree)
(5,30 degree)I think it is this one?
(5,330 degree)
(5,510 degree)
3.Give 3 representations of (3,240 degree)One has to be in radians
My choices are: (3,600 degrees)
(3,120 degree degree)
(3,pi/3)
4.Give 3 representations of (6,3pi/4)one has to be radians
I gave(6,495 degrees)
(6,225 degrees)
(6,pi/4)

PreCalc 
Henry,
1. (3,pi) = 3cos(pi) + i(3)sin(pi) =
3 + io = 3.
(3,120deg) = 1.5 + i2.6
(3,0deg) = 3 + i0 = 3.
(3,0deg) = 3 + i0 = 3.
2. (5,150deg) = 4.33 + i2.5
(5,30deg) = 4.33 + i2.5
(5,330deg) = 4.33 + i2.5
(5,510deg) = 4.33 + i2.5
My calculations show that all of # 2 is
identical.
3. (3,240deg) = 1.5  i2.6
(3,600deg) = 1.5  i2.6
(3,120deg) = 1.5  i2.6
(3,pi/3) = 1.5  i2.6
Good!!
4. (6,3pi/4) = 4.24  i4.24
(6,495deg) = 4.24  i4.24
(6,225deg) = 4.24 i4.24
(6,pi/4) = 4.24  i4.24.
Very good!