Parametric Equations and Polar Coordinates
Problems
Problem :
Is the following plane curve a function:
y = 3t
2
,
x = 
,
0≤t≤5
?
Problem : The following plane curve is a circle: x = 2 cos(t) , y = 2 sin(t) , 0≤t < 2Π . Is its orientation clockwise or couterclockwise? What happens when you reverse the parametric equations, so that x = 2 sin(t) , y = 2 cos(t) ?
Problem :
Convert the parametric equation
x = 2t
,
y = 
,
t > 0
, to a
rectangular equation.
Problem :
Convert the parametric equation
x = 3t + 1
,
y = 
,
t≠
, to a rectangular equation.
.Problem : How many times does the graph of x = t 2 - t - 6 , y = 2t , -5 < t < 5 cross the y -axis?
Problem : Jim and Bob are racing from the origin to the point (5, 10) . Let t be the number of seconds after the start of the race. Jim's position at any time t is given by the parametric equations x = t , y = 2t . Bob's position at any time t is given by the parametric equations x = 5t , y = 10t . Who will win the race? How long does it take each competitor to finish the race?
