How to eliminate the parameter and obtain an ellipse

What identity is used to solve for the trigonometric functions in terms of X and Y?

• Even-Odd identity

• Quotient identity

• Reciprocal identity

• Pythagorean identity

What is the expression for cosine of Theta in terms of X?

• Y / 4

• X / 2

• X / 4

• Y / 2

What shape does the equation y^2/4 + x^2/16 = 1 represent?

• Circle

• Parabola

• Hyperbola

• Ellipse

How is the ellipse described in terms of its orientation?

• Vertical ellipse

• Circular ellipse

• Horizontal ellipse

• Diagonal ellipse

What is suggested to better understand the characteristics of the ellipse?

• Read a textbook

• Memorize the formula

• Graph the equation

• Solve more equations