Finding the Domain In Exercises 3, 4, 5, 6, 7, 8, 9, and 10, find the domain of the vector-valued function. 3. r(t)=i+1-3tk Answer-> 4. r(t)=4-t2i+tj - 6tk 5. r(t) = In ti e'j-tk Answer-> 6. r(t) = sin ti +4 cos tj + tk 7. r(t) = F(t)+G(t), where F(t) = cos ti - sin tj + tk, G(t) = cos ti + sin tj Answer+> 8. r(t) = F(t)G(t), where F(t) = In ti+5tj-3t2k, G(t) = i + 4tj - 3tk 9. r(t) = F(t) x G(t), where Ft) sin ti + cos ti G(t)=sin ti + cos tk