r
=left parenthesis 6 Bold cos t right parenthesis Bold i plus left parenthesis 6 Bold sin t right parenthesis Bold j
(6 cosisinj
x2+y2=36. Find the? particle’s velocity and acceleration vectors at t equals StartFraction pi Over 6 EndFraction and StartFraction pi Over 3 EndFraction
t=?6 and ?3?, and sketch them as vectors on the curve.
v
=left parenthesis nothing right parenthesis
i
+left parenthesis nothing right parenthesis
j





