Unit Test #49

Select your answers to the following 5 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 

 

Q1:

 

Which equation has parametric equations:

x = 3cos t and y = 3 sin t?

A. x2 + y2 = 81

B. x2 + y2 = 9

C. (x - 3)2 + y2= 9

D. x2 + (y - 3)2= 9

Answer 1:

 

 

Q2:

 

Find dydx for the parametric equations in question 1.

A. - tan t

B. tan t

C. -cot t

D. cot t

Answer 2:

 

 

Q3:

 

What is dydx for the circle given by x = 9cos t and y = 9sin t?

A. - tan t

B. tan t

C. -cot t

D. cot t

Answer 3:

 

 

Q4:

 

Which is one of the parametric equations for the ellipse

 ?

A. x = 36cos t

B. x = 6cos t

C. x = -6cos t

D. y = 25cos t

Answer 4:

 

 

Q5:

 

Which is one of the parametric equations for the hyperbola

A. y = 4tan t

B. x = 9sec t

C. y = 2tan t

D. x = -9sec t

Answer 5: