Use Green's Theorem to evaluate F. dr. (Check the orientation of the curve before applying the theorem.) F(x, y) = (y cos(x) - xy sin(x), xy + x cos(x)), C is the triangle from (0, 0) to (0, 12) to (3, 0) to (0, 0)

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**Use Green's Theorem to Evaluate the Line Integral**

Evaluate the line integral using Green's Theorem: 

\[ \int_{C} \mathbf{F} \cdot d\mathbf{r} \]

*(Check the orientation of the curve before applying the theorem.)*

**Given:**

\[ \mathbf{F}(x, y) = \left( y \cos(x) - xy \sin(x), \, xy + x \cos(x) \right) \]

**Curve \( C \):**

\( C \) is the triangle with vertices at \( (0, 0) \), \( (0, 12) \), and \( (3, 0) \).

---

In this problem, we are asked to apply Green's Theorem to evaluate the line integral over a triangular path. Green's Theorem relates the line integral around a simple closed curve \( C \) to a double integral over the region \( D \) bounded by \( C \). The theorem is expressed as:

\[ \int_{C} \mathbf{F} \cdot d\mathbf{r} = \iint_{D} \left( \frac{\partial N}{\partial x} - \frac{\partial M}{\partial y} \right) \, dA \]

where \( \mathbf{F}(x, y) = (M(x, y), N(x, y)) \).

**Step-by-step Overview:**

1. **Identify Curve Orientation:**
   - Ensure that the curve \( C \) is oriented counterclockwise.

2. **Apply Green's Theorem:**
   - Determine \( M \) and \( N \) from the vector field \( \mathbf{F}(x, y) = (M(x, y), N(x, y)) \).
   - Compute \( \frac{\partial N}{\partial x} \) and \( \frac{\partial M}{\partial y} \).
   - Evaluate the double integral over the region \( D \) bounded by \( C \).

This structured approach will guide in computing the line integral by transforming it into a simpler double integral using Green's Theorem.
Transcribed Image Text:**Use Green's Theorem to Evaluate the Line Integral** Evaluate the line integral using Green's Theorem: \[ \int_{C} \mathbf{F} \cdot d\mathbf{r} \] *(Check the orientation of the curve before applying the theorem.)* **Given:** \[ \mathbf{F}(x, y) = \left( y \cos(x) - xy \sin(x), \, xy + x \cos(x) \right) \] **Curve \( C \):** \( C \) is the triangle with vertices at \( (0, 0) \), \( (0, 12) \), and \( (3, 0) \). --- In this problem, we are asked to apply Green's Theorem to evaluate the line integral over a triangular path. Green's Theorem relates the line integral around a simple closed curve \( C \) to a double integral over the region \( D \) bounded by \( C \). The theorem is expressed as: \[ \int_{C} \mathbf{F} \cdot d\mathbf{r} = \iint_{D} \left( \frac{\partial N}{\partial x} - \frac{\partial M}{\partial y} \right) \, dA \] where \( \mathbf{F}(x, y) = (M(x, y), N(x, y)) \). **Step-by-step Overview:** 1. **Identify Curve Orientation:** - Ensure that the curve \( C \) is oriented counterclockwise. 2. **Apply Green's Theorem:** - Determine \( M \) and \( N \) from the vector field \( \mathbf{F}(x, y) = (M(x, y), N(x, y)) \). - Compute \( \frac{\partial N}{\partial x} \) and \( \frac{\partial M}{\partial y} \). - Evaluate the double integral over the region \( D \) bounded by \( C \). This structured approach will guide in computing the line integral by transforming it into a simpler double integral using Green's Theorem.
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