Posted by **Carlos** on Tuesday, December 4, 2012 at 12:30pm.

Please check if i did right!

2. Choose the point that lies on the curve r = 2 – 3 sin θ.

A. (-5, 3π/2) <----------

B. (–2, π)

C. (1, π/2)

D. (5, π/2

3. Which of the following is not an approximate solution of x5 – 1 = 0?

A. 0.3090 – 0.9511i

B. 0.8090 + 0.5878i

C. 0.3090 + 0.9511i <-----------

D. –0.8090 + 0.5878i

5. Change -4√2 - 4√2i to trigonometric form.

A. 32 cis 135° <-----

B. 8 cis 225°

C. 8 cis 45°

D. 32 cis 45°

6. Simplify (2 cis 100°)7.

A. 2 cis 700°

B. 128 cis 280°

C. 128 cis 340°

D. 2 cis 340° <---------

8. Simplify 12(cos 52° + i sin 52°)/ 8(cos 128° + i sin 128°)

A. 3/2cis 152°

B. 3/2cis 76° <---------

C. 3/2cis 180°

D. 3/2cis 284°

9. Simplify i 45.

A. –i

B. 1 <--------

C. i

D. –1

10. Given the rectangular-form point (–1, 4), which of the following is an approximate primary representation in polar form?

A. (4.12, 1.82)

B. −(4.12, 1.82)

C. (−4.12, −1.33) <-----------

D. (4.12, 4.96)

11. Simplify (√2 cis 47°)(3√8

A. 48 cis 223°

B. 12 cis 223°

C. 48 cis 136°

D. 12 cis 136° <--------

12. Which of the following statements are true?

(i) r = 4 – 3 sin θ is the equation for a limaçon rotated 90°.

(ii) r = 3 cos 8θ is the equation for a rose curve with 8 petals.

(iii) rθ = 16 is the equation for a circle.

A. (ii) only

B. (i) only <---------

C. (i) and (ii)

D. (i) and (iii)

13. Describe the rotation required to transform the graph of r = 4 − cos (θ − 30°) sin (θ − 30°) to the graph of r = 4 − cos θ sin θ.

A. 30° counterclockwise

B. 60° clockwise <----------

C. 60° counterclockwise

D. 30° clockwise

14. Simplify (4 − 9i ) − (2 − 4i ).

A. 2 − 13i <-----------

B. 2 − 5i

C. −5 + 2i

D. 2 + 13i

15. Find the absolute value of –2 + 6i.

A. 4

B. 4√2

C. 2√2

D. 2√10<----------

- Trigonometry -
**Steve**, Tuesday, December 4, 2012 at 2:30pm
2. since sin(3π/2) = -1, (5,3π/2) would be on the curve, but not (-5,3π/2). In fact, none of the choices fits.

3. B

5. B

6. C

8. D

9. C (if that's i^45)

10. A

11. B or D (text cut off)

12. ok

13. D

14. B

15. ok

Hmm. Looks like you have some reviewing to do.

- Trigonometry -
**Erick**, Wednesday, December 5, 2012 at 1:48pm
thank you so much, i just missed a lot of school in the past month and im trying to catch up

## Answer This Question

## Related Questions

- Math, please help - Which of the following are trigonometric identities? (Can be...
- TRIGONOMETRY - Can you check my work, please? This is for a trig study guide for...
- Math integrals - What is the indefinite integral of ∫ [sin (π/x)]/ x^...
- Precalc/Trig - Sorry there are quite a few problems, but I just need to know if ...
- Math - Evaluate *Note - We have to find the exact value of these. That I know to...
- Trig Help! - Question: Trying to find cos π/12, if cos π/6 = square ...
- Calc 1 - The point (1,0) lies on the curve y=sin(10π/x). A) if Q is the ...
- Precalculus - Use one of the identities cos(t + 2πk) = cos t or sin(t + 2&#...
- Trig - find all solutions to the equation √3 csc(2theta)=-2 Would the ...
- Trig - The set of solution(s) of 2 cos^2 (θ) - 13 cos(θ) + 6 = 0 that ...

More Related Questions