Call Now to Set Up Tutoring:

(888) 888-0446

Calculus 3 : Cylindrical Coordinates

Study concepts, example questions & explanations for Calculus 3

CREATE AN ACCOUNT Create Tests & Flashcards

Home Embed

All Calculus 3 Resources

6 Diagnostic Tests 373 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

← Previous 1 2 … 18 19 20 21 22 23 24 25 26 Next →

Example Question #241 : Cylindrical Coordinates

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (107,-81^{\circ},77).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(16.74,-105.68,77)

(-105.68,16.74,77)

(83.11,67.4,77)

(67.4,83.11,77)

Correct answer:

(16.74,-105.68,77)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=107cos(-81^{\circ})=16.74\\&y=107sin(-81^{\circ})=-105.68\\&z=77\end{align*}$

Report an Error

Example Question #241 : Cylindrical Coordinates

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (102,-122^{\circ},47).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(-54.05,-86.5,47)

(-50.87,-88.41,47)

(-86.5,-54.05,47)

(-88.41,-50.87,47)

Correct answer:

(-54.05,-86.5,47)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=102cos(-122^{\circ})=-54.05\\&y=102sin(-122^{\circ})=-86.5\\&z=47\end{align*}$

Report an Error

Example Question #241 : Cylindrical Coordinates

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (18,166^{\circ},0).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(8.7,-15.76,0)

(-17.47,4.35,0)

(4.35,-17.47,0)

(-15.76,8.7,0)

Correct answer:

(-17.47,4.35,0)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=18cos(166^{\circ})=-17.47\\&y=18sin(166^{\circ})=4.35\\&z=0\end{align*}$

Report an Error

Example Question #244 : Cylindrical Coordinates

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (52,-100^{\circ},26).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(26.33,44.84,26)

(-51.21,-9.03,26)

(44.84,26.33,26)

(-9.03,-51.21,26)

Correct answer:

(-9.03,-51.21,26)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=52cos(-100^{\circ})=-9.03\\&y=52sin(-100^{\circ})=-51.21\\&z=26\end{align*}$

Report an Error

Example Question #245 : Cylindrical Coordinates

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (113,2^{\circ},-74).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(102.75,-47.02,-74)

(112.93,3.94,-74)

(-47.02,102.75,-74)

(3.94,112.93,-74)

Correct answer:

(112.93,3.94,-74)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=113cos(2^{\circ})=112.93\\&y=113sin(2^{\circ})=3.94\\&z=-74\end{align*}$

Report an Error

Example Question #331 : 3 Dimensional Space

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (105,166^{\circ},118).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(-91.92,50.75,118)

(25.4,-101.88,118)

(-101.88,25.4,118)

(50.75,-91.92,118)

Correct answer:

(-101.88,25.4,118)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=105cos(166^{\circ})=-101.88\\&y=105sin(166^{\circ})=25.4\\&z=118\end{align*}$

Report an Error

Example Question #332 : 3 Dimensional Space

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (83,-127^{\circ},-109).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(-80.73,19.29,-109)

(-49.95,-66.29,-109)

(19.29,-80.73,-109)

(-66.29,-49.95,-109)

Correct answer:

(-49.95,-66.29,-109)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=83cos(-127^{\circ})=-49.95\\&y=83sin(-127^{\circ})=-66.29\\&z=-109\end{align*}$

Report an Error

Example Question #248 : Cylindrical Coordinates

$\begin{align*}&\text{A point in space is located, in cylindrical coordinates, at } (39,-89^{\circ},103).\\&\text{What is the position of this point in Cartesian coordinates?}\end{align*}$

Possible Answers:

(-33.54,19.9,103)

(-38.99,0.68,103)

(19.9,-33.54,103)

(0.68,-38.99,103)

Correct answer:

(0.68,-38.99,103)

Explanation:

$\begin{align*}&\text{If asked to convert cylindrical coordinates of the form} (r,\theta,z)\\&\text{to Cartesian coordinates of the form }(x,y,z)\text{, it is necessary to relate } x\text{ and }y\\& \text{to the radius, }r\text{, and the angle, }\theta.\text{ The relationships are as follows:}\\&x=rcos(\theta)\\&y=rsin(\theta)\\&\text{Finding }z\text{ is much simpler; it does not change between}\\& \text{Cartesian and cylindrical coordinates:}\\&z=z\\&\text{However, care should be taken when finding }x\text{ and }y\text{; if using a calculator, it is}\\& \text{imperative that the correct units (degrees or radians) are specified}\\& \text{for the input!}\\&\text{For our coordinates}\\&x=39cos(-89^{\circ})=0.68\\&y=39sin(-89^{\circ})=-38.99\\&z=103\end{align*}$

Report an Error

Example Question #249 : Cylindrical Coordinates

Find a parametric representation of the circle 3x^2 + 9 y ^2 = 27 .

Possible Answers:

$\vec{r}(t)= \left< \cos 3t, \sqrt{3} \sin 3t \right>$

$\vec{r}(t)= \left< \cos t, \sin t \right>$

$\vec{r}(t)= \left< 3 \cos t, \sqrt{3} \tan t \right>$

$\vec{r}(t)= \left< 3 \cos t, \sqrt{3} \sin t \right>$

Correct answer:

$\vec{r}(t)= \left< 3 \cos t, \sqrt{3} \sin t \right>$

Explanation:

We can begin by rewriting the equation for a circle as

$3x^2 + 9y^2 = 27 \Rightarrow \left(\frac{x}{3} \right )^2 + \left(\frac{y}{\sqrt{3}} \right )^2=1$ .

This directly tells us that $x = 3 \cos t, y = \sqrt{3} \sin t$ . This allows us to write our final expression for the parametric representation as

$\vec{r}(t)= \left< 3 \cos t, \sqrt{3} \sin t \right>$

Report an Error

Example Question #241 : Cylindrical Coordinates

Convert the following vector in Cartesian coordinates into cylindrical coordinates.

(3xy, x^2z, y)

Possible Answers:

$(3r^2\sin\theta \cos\theta, rz\sin^2 \theta, r\cos \theta )$

$(3r^2\sin\theta \cos\theta, r\sin^2 \theta, \cos \theta )$

$(3r^2\sin\theta \cos\theta, r\sin^2 \theta, r\cos \theta )$

$(3r\cos\theta \sin \theta, rz\cos^2 \theta, r\sin \theta )$

$(3r^2\cos\theta \sin \theta, rz\cos^2 \theta, r\sin \theta )$

Correct answer:

$(3r^2\cos\theta \sin \theta, rz\cos^2 \theta, r\sin \theta )$

Explanation:

The conversion from Cartesian to cylindrical coordinates is as follows:

$x=r\cos \theta$

$y=r \sin \theta$

z=z

The three components of the vector then become:

$3xy\rightarrow3r\cos \theta \:r\sin \theta=3r^2\cos\theta \sin\theta$

$x^2z\rightarrow r^2 \cos^2\theta z$

$y\rightarrow r\sin \theta$

Report an Error

← Previous 1 2 … 18 19 20 21 22 23 24 25 26 Next →

View Calculus 3 Tutors

Suraj
Certified Tutor

Cornell University, Bachelor of Science, Computer Science.

View Calculus 3 Tutors

Joshua
Certified Tutor

United States Naval Academy, Bachelors, Mathematics. University of Georgia, Masters, Mathematics.

View Calculus 3 Tutors

Moayad
Certified Tutor

Jordan University of Science and Technology, Bachelor of Science, Mathematics. Oregon State University, Master of Science, Ma...

All Calculus 3 Resources

6 Diagnostic Tests 373 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

SAT Tutoring in Washington DC, Chemistry Tutoring in Miami, MCAT Tutoring in Miami, ACT Tutoring in Chicago, English Tutoring in Chicago, ISEE Tutoring in Seattle, Math Tutoring in Chicago, Calculus Tutoring in Philadelphia, MCAT Tutoring in New York City, Algebra Tutoring in Chicago

Popular Courses & Classes

GRE Courses & Classes in Chicago, LSAT Courses & Classes in Miami, ACT Courses & Classes in Philadelphia, Spanish Courses & Classes in New York City, MCAT Courses & Classes in San Diego, GRE Courses & Classes in Atlanta, LSAT Courses & Classes in Atlanta, ISEE Courses & Classes in Philadelphia, SAT Courses & Classes in New York City, SAT Courses & Classes in Dallas Fort Worth

Popular Test Prep

MCAT Test Prep in San Francisco-Bay Area, SAT Test Prep in Miami, LSAT Test Prep in Chicago, GRE Test Prep in Philadelphia, ACT Test Prep in Philadelphia, SAT Test Prep in Chicago, SSAT Test Prep in Washington DC, ISEE Test Prep in Philadelphia, SAT Test Prep in Denver, ISEE Test Prep in Chicago

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

Calculus 3 : Cylindrical Coordinates

Study concepts, example questions & explanations for Calculus 3

All Calculus 3 Resources

Example Questions

Example Question #241 : Cylindrical Coordinates

Example Question #241 : Cylindrical Coordinates

Example Question #241 : Cylindrical Coordinates

Example Question #244 : Cylindrical Coordinates

Example Question #245 : Cylindrical Coordinates

Example Question #331 : 3 Dimensional Space

Example Question #332 : 3 Dimensional Space

Example Question #248 : Cylindrical Coordinates

Example Question #249 : Cylindrical Coordinates

Example Question #241 : Cylindrical Coordinates

All Calculus 3 Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

FIND THE BEST TUTORS

Email address:
Your name:

Email address:
Your name:
Feedback: