# precalculus

posted by
**dreidel** on
.

To what interval I must we restrict the parameter t if the graph of the parametric equations

x=t+1

y = 2t^2 +1

for t in the set I

is identical to the graph of the parametric equations

x = 1+ sin s

y = 2- cos(2s)

for s in [0,pi)?