# Pre-Calc

posted by .

Please check my answers I really need to do my homeowrk!;This are polar coordinates we're studying-I'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)

• Pre-Calc -

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!

## Similar Questions

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 …

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 …
3. ### Pre-Calc

I know about Descartes Rule but I don't really get how to figure this out-Please check my answers- I don't get this one find number of possible positive and negative real roots of f(x) = x^4-x^3+2x^2 + x-5 I think there are 3 sign …
4. ### Pre-Calc

Can anyone direct me to learn more about polar coordinates. I'm in online college course and really am confused. In high school, I never heard of polar coordinates. Like they say is the following the graph of point (3,15) and show …
5. ### Pre-Calc

Please check my answers; 1.Which of the folowing is another representation of (-3,pi)?
6. ### Pre-Calc P lease check

Please check my answers; 1.Which of the folowing is another representation of (-3,pi)?
7. ### Pre-Calc

Please check my answers;This are polar coordinates we're studying-I'm almost positive the first two are correct. 1.Which of the folowing is another representation of (-3,pi)?
8. ### Pre-Calc-Please check I'm desperate

Please check my answers I really need to do my homeowrk!;This are polar coordinates we're studying-I'm almost positive the first two are correct. 1.Which of the folowing is another representation of (-3,pi)?
9. ### Pre-Calc

I posted yesterday and didn't get a response so I'm hoping someone can check these today-Thank you they are polar coordinate questions--My answers are her I just need them checked- 1.Which of the folowing is another representation …
10. ### Pre-Calculus

I posted earlier and didn't get an answer so I'm posting again-hoping someone could please check these two-I think they're correct Please check my answer: I think it's correct?

More Similar Questions