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Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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![### Calculus Exercise: Partial Derivatives and Parametric Equations
In this exercise, we will explore partial derivatives with respect to parametric equations. Consider the function and parametric equations provided below:
#### Function:
\[ f(x, y) = x^2 + y^2 \]
#### Parametric Equations:
\[ x = \sin(2\theta) \]
\[ y = \cos(2\theta) \]
We are interested in finding the following derivatives:
\[ \frac{\partial f}{\partial x} = \]
\[ \frac{\partial f}{\partial y} = \]
### Steps to Solve
1. **Substitute the parametric equations into the function:**
\[
f(x, y) = (\sin(2\theta))^2 + (\cos(2\theta))^2
\]
2. **Simplify the function if possible.**
3. **Calculate the partial derivatives with respect to \( x \) and \( y \):**
\[
\frac{\partial f}{\partial x} = \frac{\partial}{\partial x}(x^2 + y^2)
\]
\[
\frac{\partial f}{\partial y} = \frac{\partial}{\partial y}(x^2 + y^2)
\]
### Explanation:
- When calculating the partial derivative with respect to \( x \), treat \( y \) as a constant, and vice versa.
- Substitute the expressions for \( x \) and \( y \) in terms of \( \theta \).
This exercise helps to understand the application of partial derivatives with parametric functions, a valuable skill in multivariable calculus and mathematical modeling.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faaa612e4-bb6a-4a7c-9bcb-a4980796bdd1%2F2ca594a9-af56-4be7-a001-67d17dca7872%2Fkqurup_reoriented.jpeg&w=3840&q=75)

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