Vector Projections

1. Sep 9, 2011

waters

Which of the following curves have the same projection onto the xy plane?
a) <t, t^2, e^t>
b) <e^t, t^2, t>
c) <t, t^2, cost>

2. Sep 9, 2011

Spinnor

Projecting onto the xy plane means setting z = 0 ?

3. Sep 9, 2011

waters

I don't know, but that makes sense.