# How do you find the parametric equation of a circle?

## How do you find the parametric equation of a circle?

Lesson Summary

1. The parametric equation of the circle x2 + y2 = r2 is x = rcosθ, y = rsinθ.
2. The parametric equation of the circle x 2 + y 2 + 2gx + 2fy + c = 0 is x = -g + rcosθ, y = -f + rsinθ.

What is the parametric equation of circle?

The equation of a circle in parametric form is given by x=acosθ , y=asinθ .

Which is a parametric equation for the curve?

The equations that are used to define the curve are called parametric equations. are called parametric equations and t is called the parameter. The set of points (x,y) obtained as t varies over the interval I is called the graph of the parametric equations.

### What is the curve of a circle?

At every point on a circle, the curvature is the reciprocal of the radius; for other curves (and straight lines, which can be regarded as circles of infinite radius), the curvature is the reciprocal of the radius of the circle that most closely conforms to the curve at the given point (see figure). …

What is the parametric equation of hyperbola?

The equations x = a sec θ, y = b tan θ taken together are called the parametric equations of the hyperbola x2a2 – y2b2 = 1; where θ is parameter (θ is called the eccentric angle of the point P).

How do you graph a parametric equation?

Graph the parametric equations [latex]x=5cos tlatex] and [latex]y=2sin t[/latex]. First, construct the graph using data points generated from the parametric form. Then graph the rectangular form of the equation. Compare the two graphs. Solution. Construct a table of values like the table below.

#### How to do Cartesian plane equations?

Choose your x-values to input into the formula. Usually you’ll want to choose integers (whole numbers plus zero and negatives like -10,3,1,7…) because they are easier to

• Create a few (x,y) coordinates.
• Plot the points on a Cartesian plane.
• Draw the curve or line of the graph.
• How to find parametric equations?

Take the parameter equation and switch the roles of the parameter and the other variable. This will result in one parametric equation.

• Substitute the expression for the variable in Step 1 into the rectangular equation. This will result in the second parametric equation.
• Sketch the curve.
• What curve does the parametric equations trace out?

A sketch of the parametric curve (including direction of motion) based on the equation you get by eliminating the parameter.

• Limits on x x and y y.
• A range of t t ’s for a single trace of the parametric curve.
• The number of traces of the curve the particle makes if an overall range of t t ’s is provided in the problem.