Math Help Forum: parametric

Find the values of a, b, c, and d if the equations trace out the circles shown below.

x = a + bcos(t) , y = c + dsin(t) , 0<_t<_2pi



C1:
a=
b=
c=
d=

C2:
a=
b=
c=
d=

C3:
a=
b=
c=
d=


i need some help with this one...mainly on how to find the different values that it is asking for...thanks...

mer1988

Originally Posted by mer1988

x = a + bcos(t) , y = c + dsin(t) , 0<_t<_2pi

The centers are (a,c).
If it's a circle, b = d = Radius

Just write them down. No calculations required.