Calculus 2 : Graphing Vectors

Study concepts, example questions & explanations for Calculus 2

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Example Questions

Example Question #2 : Vector Form

The graph of the vector function \(\displaystyle r(t)=\left \langle \frac{1}{2}t,\sin(t)\right \rangle\)can also be represented by the graph of which of the following functions in rectangular form?

Possible Answers:

\(\displaystyle y=-\sin(\frac{x}2{})\)

\(\displaystyle y=-\sin(2x)\)

\(\displaystyle y=2\sin(x)\)

\(\displaystyle y=\sin(2x)\)

\(\displaystyle y=\sin(\frac{x}2{})\)

Correct answer:

\(\displaystyle y=\sin(2x)\)

Explanation:

We can find the graph of \(\displaystyle r(t)=\left \langle \frac{1}{2}t,\cos(t)\right \rangle\) in rectangular form by mapping the parametric coordinates to Cartesian coordinates :

\(\displaystyle x=\frac{1}{2}t\)

\(\displaystyle t=2x\)

We can now use this value to solve for :

\(\displaystyle y=\sin(2x)\)

Example Question #3 : Vector Form

The graph of the vector function \(\displaystyle r(t)=\left \langle 3t^{2}-1,\cos(t)\right \rangle\)can also be represented by the graph of which of the following functions in rectangular form?

Possible Answers:

\(\displaystyle y=\cos\sqrt{\frac{3}{x-1}}\)

\(\displaystyle y=-\cos\sqrt{\frac{x-1}{3}}\)

\(\displaystyle y=\cos\sqrt{\frac{x+1}{3}}\)

\(\displaystyle y=-\cos\sqrt{\frac{x+1}{3}}\)

\(\displaystyle y=\cos\sqrt{\frac{x-1}{3}}\)

Correct answer:

\(\displaystyle y=\cos\sqrt{\frac{x+1}{3}}\)

Explanation:

We can find the graph of \(\displaystyle r(t)=\left \langle 3t^{2}-1,\cos(t)\right \rangle\) in rectangular form by mapping the parametric coordinates to Cartesian coordinates :

\(\displaystyle x=3t^{2}-1\)

\(\displaystyle x+1=3t^{2}\)

\(\displaystyle \frac{x+1}{3}=t^{2}\)

\(\displaystyle t=\sqrt{\frac{x+1}{3}}\)

We can now use this value to solve for :

\(\displaystyle y=\cos\sqrt{\frac{x+1}{3}}\)

Example Question #111 : Vector

The graph of the vector function \(\displaystyle r(t)=\left \langle 5+2t,\sin^{2}(t)\right \rangle\)can also be represented by the graph of which of the following functions in rectangular form?

Possible Answers:

\(\displaystyle y=-\sin^{2}(\frac{x+5}{2})\)

\(\displaystyle y=\sin^{2}(\frac{x+5}{2})\)

\(\displaystyle y=\sin^{2}(\frac{x-5}{2})\)

\(\displaystyle y=\sin^{2}(\frac{2}{x-5})\)

\(\displaystyle y=-\sin^{2}(\frac{x-5}{2})\)

Correct answer:

\(\displaystyle y=\sin^{2}(\frac{x-5}{2})\)

Explanation:

We can find the graph of \(\displaystyle r(t)=\left \langle 5+2t,\sin^{2}(t)\right \rangle\) in rectangular form by mapping the parametric coordinates to Cartesian coordinates :

\(\displaystyle x=5+2t\)

\(\displaystyle 2t=x-5\)

\(\displaystyle t=\frac{x-5}{2}\)

We can now use this value to solve for :

\(\displaystyle y=\sin^{2}(t)\)

\(\displaystyle y=\sin^{2}(\frac{x-5}{2})\)

Example Question #11 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < 8,13>\) terminate from the origin?

Possible Answers:

\(\displaystyle I\)

\(\displaystyle III\)

\(\displaystyle II\)

\(\displaystyle IV\)

Correct answer:

\(\displaystyle I\)

Explanation:

The vector

\(\displaystyle < 8,13>\)

goes \(\displaystyle 8\) units right from the origin and \(\displaystyle 13\) units up, terminating in Quadrant I.

Example Question #12 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < 7,-10>\) terminate from the origin?

Possible Answers:

\(\displaystyle I\)

\(\displaystyle III\)

\(\displaystyle II\)

\(\displaystyle IV\)

Correct answer:

\(\displaystyle IV\)

Explanation:

The vector

\(\displaystyle < 7,-10>\)

goes \(\displaystyle 7\) units right from the origin and \(\displaystyle 10\) units down, terminating in Quadrant IV.

Example Question #13 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < -8,13>\) terminate from the origin?

Possible Answers:

\(\displaystyle II\)

\(\displaystyle IV\)

\(\displaystyle III\)

\(\displaystyle I\)

Correct answer:

\(\displaystyle II\)

Explanation:

The vector

\(\displaystyle < -8,13>\)

goes \(\displaystyle 8\) units left from the origin and \(\displaystyle 13\) units up, terminating in Quadrant II.

Example Question #14 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < -1,-1>\) terminate from the origin?

Possible Answers:

\(\displaystyle III\)

\(\displaystyle II\)

\(\displaystyle IV\)

\(\displaystyle I\)

Correct answer:

\(\displaystyle III\)

Explanation:

The vector

\(\displaystyle < -1,-1>\)

goes \(\displaystyle 1\) unit left from the origin and \(\displaystyle 1\) units down, terminating in Quadrant III.

Example Question #15 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < 8,13>\) terminate from the origin?

Possible Answers:

Quadrant I

Quadrant IV

Quadrant III

Quadrant II

Correct answer:

Quadrant I

Explanation:

From the origin, the vector \(\displaystyle < 8,13>\) goes to the right \(\displaystyle 8\) units and up \(\displaystyle 13\) units, terminating in

Quadrant I.

Example Question #16 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < -5,-2>\) terminate from the origin?

Possible Answers:

Quadrant IV

Quadrant II

Quadrant I

Quadrant III

Correct answer:

Quadrant III

Explanation:

From the origin, the vector \(\displaystyle < -5,-2>\) goes to the left \(\displaystyle 5\) units and down \(\displaystyle 2\) units, terminating in

Quadrant III.

Example Question #17 : Graphing Vectors

In which quadrant does the vector \(\displaystyle < 57,-12>\) terminate from the origin?

 

 
Possible Answers:

Quadrant I

Quadrant IV

Quadrant II

Quadrant III

Correct answer:

Quadrant IV

Explanation:

From the origin, the vector \(\displaystyle < 57,-12>\) goes to the right \(\displaystyle 57\) units and down \(\displaystyle 12\) units, terminating in

Quadrant IV.

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