# How do you eliminate a parameter with sin and cos?

## How do you eliminate a parameter with sin and cos?

To eliminate the angle parameter, rewrite the parametric equations in terms that can be substituted into a trigonometric identity. To eliminate the angle parameter of the two parametric equations above, rewrite the equations in terms of sin θ and cos θ and use trigonometric identity sin 2 θ + cos 2 θ = 1 .

### How do you Parametrize an equation?

To find a parametrization, we need to find two vectors parallel to the plane and a point on the plane. Finding a point on the plane is easy. We can choose any value for x and y and calculate z from the equation for the plane. Let x=0 and y=0, then equation (1) means that z=18−x+2y3=18−0+2(0)3=6.

#### How do you remove parameters from a parametric equation?

To eliminate the parameter, solve one of the parametric equations for the parameter. Then substitute this result for the parameter in the other parametric equation and simplify.

**How do you eliminate parameters?**

This method is referred to as eliminating the parameter. To eliminate the parameter, solve one of the parametric equations for the parameter. Then substitute this result for the parameter in the other parametric equation and simplify.

**How to make a graph from a parametric equation?**

\\displaystyle x=5\\cos t,y=3\\sin t x = 5 c o s t, y = 3 s i n t. \\displaystyle y=2\\sin t y = 2 s i n t. First, construct the graph using data points generated from the parametric form. Then graph the rectangular form of the equation. Compare the two graphs. Construct a table of values like the table below. . . . . . .

## How are X and Y related in parametric equations?

Although rectangular equations in x and y give an overall picture of an object’s path, they do not reveal the position of an object at a specific time. Parametric equations, however, illustrate how the values of x and y change depending on t, as the location of a moving object at a particular time.

### How are parametric equations related to Cartesian equations?

The path you will trace out will be the unit circle. But more importantly, you can give your location at any time because your position is given by the pair of parametric equations. So while the Cartesian equation of the unit circle describes the route you walk, the parametric equations describe your location at any time.

#### Why do we use parametric equations for curves?

There are also a great many curves out there that we can’t even write down as a single equation in terms of only x x and y y. So, to deal with some of these problems we introduce parametric equations.