The problem asks us to sketch the graph of the polar equation $r = 2\sin(2\theta)$.

GeometryPolar CoordinatesGraphingPolar EquationsFour-Leaf Rose
2025/6/3

1. Problem Description

The problem asks us to sketch the graph of the polar equation r=2sin(2θ)r = 2\sin(2\theta).

2. Solution Steps

We need to analyze the polar equation r=2sin(2θ)r = 2\sin(2\theta) to determine the shape of the graph.
First, let's consider some key values of θ\theta and find the corresponding values of rr:
- θ=0\theta = 0: r=2sin(0)=0r = 2\sin(0) = 0
- θ=π4\theta = \frac{\pi}{4}: r=2sin(π2)=2r = 2\sin(\frac{\pi}{2}) = 2
- θ=π2\theta = \frac{\pi}{2}: r=2sin(π)=0r = 2\sin(\pi) = 0
- θ=3π4\theta = \frac{3\pi}{4}: r=2sin(3π2)=2r = 2\sin(\frac{3\pi}{2}) = -2
- θ=π\theta = \pi: r=2sin(2π)=0r = 2\sin(2\pi) = 0
- θ=5π4\theta = \frac{5\pi}{4}: r=2sin(5π2)=2r = 2\sin(\frac{5\pi}{2}) = 2
- θ=3π2\theta = \frac{3\pi}{2}: r=2sin(3π)=0r = 2\sin(3\pi) = 0
- θ=7π4\theta = \frac{7\pi}{4}: r=2sin(7π2)=2r = 2\sin(\frac{7\pi}{2}) = -2
- θ=2π\theta = 2\pi: r=2sin(4π)=0r = 2\sin(4\pi) = 0
The graph of r=2sin(2θ)r = 2\sin(2\theta) is a four-leaf rose. Each leaf is symmetric about its axis.
- The first leaf is in the first quadrant, extending from θ=0\theta = 0 to θ=π2\theta = \frac{\pi}{2}, with a maximum at θ=π4\theta = \frac{\pi}{4}.
- The second leaf is in the second quadrant, extending from θ=π2\theta = \frac{\pi}{2} to θ=π\theta = \pi.
- The third leaf is in the third quadrant, extending from θ=π\theta = \pi to θ=3π2\theta = \frac{3\pi}{2}.
- The fourth leaf is in the fourth quadrant, extending from θ=3π2\theta = \frac{3\pi}{2} to θ=2π\theta = 2\pi.
Each leaf has a maximum distance of 2 from the origin.

3. Final Answer

The graph of r=2sin(2θ)r = 2\sin(2\theta) is a four-leaf rose, where each leaf has a maximum radius of 2.

Related problems in "Geometry"

The problem involves calculating the surface area of different types of leaves given their length (L...

Surface AreaGeometric FormulasArea Calculation
2025/7/24

We have a figure with two triangles, $\triangle TPQ$ and $\triangle SRQ$. We are given that $PT$ an...

Similar TrianglesRatio and ProportionAlgebra
2025/7/24

The problem asks us to find the value of $x$ in 10 different diagrams. All lengths are in cm. Severa...

Pythagorean TheoremRight TrianglesTriangle SimilarityAlgebraQuadratic Equations
2025/7/24

Given a circle $O$ with chord $AB = 5$. Point $C$ is on the extension of $AB$ such that $BC = 4$. A ...

Circle GeometryTangent-Secant TheoremSimilar TrianglesAngle Bisector TheoremGeometric RatiosEuclidean Geometry
2025/7/24

A triangular prism ABC-DEF has an isosceles triangle as its base with $AB = AC = 9$ cm, $BC = 6$ cm,...

3D GeometryVolumeSurface AreaPrismsTrianglesRatio
2025/7/24

The problem asks to identify the hypotenuse, the opposite side to angle $\theta$, and the adjacent s...

Right TrianglesTrigonometryHypotenuseOpposite SideAdjacent Side
2025/7/21

The problem asks to identify the hypotenuse, the opposite side, and the adjacent side to the angle $...

TrigonometryRight TrianglesHypotenuseOpposite SideAdjacent SideAngle
2025/7/21

The problem asks us to find the value of $y$ in two right triangles. In the first triangle (a), the ...

Pythagorean TheoremRight TrianglesTriangle PropertiesSquare Roots
2025/7/21

The problem asks us to find the value of $y$ in two right triangles. In the first triangle, the angl...

Pythagorean TheoremRight TrianglesTrigonometry
2025/7/21

We are asked to find the value of $y$ in two right triangles. a) The right triangle has a leg of len...

Right TrianglesPythagorean TheoremTrigonometry45-45-90 Triangle30-60-90 TriangleSineCosine
2025/7/21