F∈d velocity vect and accelation vect at <span class="katex-r" data-latex="displaystyle t=0"></span> of a pticle whose motion is desibed by the vect function <span class="katex-r" data-latex="displaystyle vec{r}(t)=(t e^{s∈ t}, s∈ t, t cos tright)"></span>.