Tutorial Exercise Convert the polar equation to rectangular form and sketch its graph. r = 9 cot(8) csc(0) Step 1 The polar coordinates (r, 0) of a point are related to the rectangular coordinates (x, y) of the point as follows. x = r cos (0) y = r sin (0) Step 2 The given polar equation can be rewritten as follows. r = 9 cote csce r = 9 cote y = sin (0) 9x = sin = 9 cote Converting to rectangular coordinates using x = r cos 0 and y = r sin 8 gives 9x ✓ V cos e y Step 3 Sketch the graph of y² = 9x. sin 0 9.x 1 sine y² y

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Question
### Graph Analysis

The image displays four graphs, each depicting a different function or equation on a Cartesian coordinate system. Below is a detailed explanation of each graph:

1. **Top Left Graph:**
   - **Axes:**
     - Horizontal axis labeled as `x`, ranging from 0 to 5.
     - Vertical axis labeled as `y`, ranging approximately from -6 to 4.
   - **Curve Description:**
     - The curve starts below the x-axis and increases steadily. It appears to be a type of exponential or non-linear growth.

2. **Top Right Graph:**
   - **Axes:**
     - Horizontal axis labeled as `x`, ranging from 0 to 5.
     - Vertical axis labeled as `y`, ranging approximately from -6 to 4.
   - **Curve Description:**
     - This graph displays a curve with a similar initial rise like the first graph but appears to start slightly lower. It may be a variant of the function in the first graph.

3. **Bottom Left Graph:**
   - **Axes:**
     - Horizontal axis labeled as `x`, ranging from 0 to 5.
     - Vertical axis labeled as `y`, ranging from 0 to 200.
   - **Curve Description:**
     - The curve demonstrates typical exponential growth, starting near the origin and rising rapidly as `x` increases.

4. **Bottom Right Graph:**
   - **Axes:**
     - Horizontal axis labeled as `x`, ranging from 0 to 5.
     - Vertical axis labeled as `y`, approximately ranging from -100 to 100.
   - **Curve Description:**
     - This graph features a curve with two vertical asymptotes around `x = 2.5` and `x = 4`. The curve approaches infinity both positively and negatively indicative of a rational function with undefined points.

### Instructional Section

**Step 4:**
- **Instructions:**
  - Analyze the graph of the polar equation \( r = \cot \theta \csc \theta \).
  - Identify the type of graph it forms by selecting an option from the dropdown menu.
  - Write the equation in standard form in the provided text box.

- **Submission:**
  - Click "Submit" after completing the form.
  - Option to "Skip" the step, with a note that you cannot return to it later.
Transcribed Image Text:### Graph Analysis The image displays four graphs, each depicting a different function or equation on a Cartesian coordinate system. Below is a detailed explanation of each graph: 1. **Top Left Graph:** - **Axes:** - Horizontal axis labeled as `x`, ranging from 0 to 5. - Vertical axis labeled as `y`, ranging approximately from -6 to 4. - **Curve Description:** - The curve starts below the x-axis and increases steadily. It appears to be a type of exponential or non-linear growth. 2. **Top Right Graph:** - **Axes:** - Horizontal axis labeled as `x`, ranging from 0 to 5. - Vertical axis labeled as `y`, ranging approximately from -6 to 4. - **Curve Description:** - This graph displays a curve with a similar initial rise like the first graph but appears to start slightly lower. It may be a variant of the function in the first graph. 3. **Bottom Left Graph:** - **Axes:** - Horizontal axis labeled as `x`, ranging from 0 to 5. - Vertical axis labeled as `y`, ranging from 0 to 200. - **Curve Description:** - The curve demonstrates typical exponential growth, starting near the origin and rising rapidly as `x` increases. 4. **Bottom Right Graph:** - **Axes:** - Horizontal axis labeled as `x`, ranging from 0 to 5. - Vertical axis labeled as `y`, approximately ranging from -100 to 100. - **Curve Description:** - This graph features a curve with two vertical asymptotes around `x = 2.5` and `x = 4`. The curve approaches infinity both positively and negatively indicative of a rational function with undefined points. ### Instructional Section **Step 4:** - **Instructions:** - Analyze the graph of the polar equation \( r = \cot \theta \csc \theta \). - Identify the type of graph it forms by selecting an option from the dropdown menu. - Write the equation in standard form in the provided text box. - **Submission:** - Click "Submit" after completing the form. - Option to "Skip" the step, with a note that you cannot return to it later.
**Tutorial Exercise**

Convert the polar equation to rectangular form and sketch its graph.

\[ r = 9 \cot(\theta) \csc(\theta) \]

**Step 1**

The polar coordinates \( (r, \theta) \) of a point are related to the rectangular coordinates \( (x, y) \) of the point as follows:

\[ x = r \cos(\theta) \]

\[ y = r \sin(\theta) \]

**Step 2**

The given polar equation can be rewritten as follows:

\[ r = 9 \cot \theta \, \csc \theta \]

\[ r = 9 \cot \theta \cdot \frac{1}{\sin \theta} \]

\[ \frac{r \, \sin(\theta)}{\sin \theta} = 9 \, \cot \theta \]

Converting to rectangular coordinates using \( x = r \cos \theta \) and \( y = r \sin \theta \) gives:

\[ y = \frac{9x}{y} \]

\[ 9x = y^2 \]

**Step 3**

Sketch the graph of \( y^2 = 9x \). 

The graph represents a parabola that opens to the right with vertex at the origin.
Transcribed Image Text:**Tutorial Exercise** Convert the polar equation to rectangular form and sketch its graph. \[ r = 9 \cot(\theta) \csc(\theta) \] **Step 1** The polar coordinates \( (r, \theta) \) of a point are related to the rectangular coordinates \( (x, y) \) of the point as follows: \[ x = r \cos(\theta) \] \[ y = r \sin(\theta) \] **Step 2** The given polar equation can be rewritten as follows: \[ r = 9 \cot \theta \, \csc \theta \] \[ r = 9 \cot \theta \cdot \frac{1}{\sin \theta} \] \[ \frac{r \, \sin(\theta)}{\sin \theta} = 9 \, \cot \theta \] Converting to rectangular coordinates using \( x = r \cos \theta \) and \( y = r \sin \theta \) gives: \[ y = \frac{9x}{y} \] \[ 9x = y^2 \] **Step 3** Sketch the graph of \( y^2 = 9x \). The graph represents a parabola that opens to the right with vertex at the origin.
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