# How do you find the polar equation of a function?

## How do you find the polar equation of a function?

Solution: Identify the type of polar equation The polar equation is in the form of a limaçon, r = a – b cos θ. Since the equation passes the test for symmetry to the polar axis, we only need to evaluate the equation over the interval [0, π] and then reflect the graph about the polar axis.

## What does the polar equation r 6 represent?

As r in polar coordinates denotes the distance of a point from center, the equation r=6 denotes all those points who are at a distance of six units from center. As is apparent, the graph is a circle with center at origin and radius 6 .

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How do you solve for polar coordinates?

How to: Given polar coordinates, convert to rectangular coordinates.

1. Given the polar coordinate (r,θ), write x=rcosθ and y=rsinθ.
2. Evaluate cosθ and sinθ.
3. Multiply cosθ by r to find the x-coordinate of the rectangular form.
4. Multiply sinθ by r to find the y-coordinate of the rectangular form.

### How do you find R in polar coordinates?

To convert from Cartesian Coordinates (x,y) to Polar Coordinates (r,θ):

1. r = √ ( x2 + y2 )
2. θ = tan-1 ( y / x )

### How do you convert R theta to rectangular?

To convert from polar coordinates to rectangular coordinates, use the formulas x=rcosθ and y=rsinθ.

How do you find the symmetry of a polar equation?

If in the polar equation, (r, θ) can be replaced by (r, – θ)or(- r, Π – θ), the graph is symmetric with respect to the polar axis. If in the polar equation, (r, θ) can be replaced by (- r, θ)or(r, Π + θ), the graph is symmetric with respect to the pole.

#### Which formula represents Theta in a polar coordinate?

Taking the ratio of y and x from equation (1), one can obtain a formula for θ, yx=rsinθrcosθ=tanθ.

#### How do you find the polar Cartesian equation?

To convert from Cartesian coordinates to polar coordinates: r=√x2+y2 . Since tanθ=yx, θ=tan−1(yx) . So, the Cartesian ordered pair (x,y) converts to the Polar ordered pair (r,θ)=(√x2+y2,tan−1(yx)) .

Which formula represents R in a polar coordinate?

To go the other direction, one can use the same right triangle. Since r is the distance from the origin to (x,y), it is the magnitude r=√x2+y2. Alternatively, from the equation (1), one can calculate directly that x2+y2=r2cos2θ+r2sin2θ=r2(cos2θ+sin2θ)=r2.

## How do you graph R = 6 sin θ?

How do you graph r = 6 sin θ? In Cartesian plane draw a circle with center at (0,3) and radius 3. The relation between polar coordinates (r,θ) and Cartesian coordinates (x,y) is x = rcosθ, y = rsinθ and r2 = x2 +y2.

## What is the formula for converting Cartesian to polar?

Cartesian to Polar Conversion Formulas r2 = x2 + y2 r = √x2 + y2 θ = tan − 1(y x) Let’s work a quick example. Example 1 Convert each of the following points into the given coordinate system.

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How do you find the polar coordinate of a graph?

Common Polar Coordinate Graphs 1 θ = β . We can see that this is a line by converting to Cartesian coordinates as follows θ = β tan − 1(y x) = β y x 2 rcosθ = a This is easy enough to convert to Cartesian coordinates to x = a. So, this is a vertical line. 3 rsinθ = b Likewise, this converts to y = b and so is a horizontal line.