Solution
For this case we can do the following:
the velocity can be founded with the first derivate and we got:
v(t)= (cos t, -2sin t)
And the acceleration is the derivate of the velocity so we got:
a(t)= (-sin t, -2 cos t)
And if we replace t=1 we got:
a(1)= (-sin(1), -2 cos(1))
