1-Convert the given Cartesian equation to a polar equation. Use "theta" for . x^2=9y

2-Write the complex number in polar form. Answer exactly, in radians with r>0 and 0<2. 1/2+1/2i= cis( )

3-Given a vector with initial point (4,2) and terminal point (0,5), write the vector v in terms of i and j. v=i+j

4-let v=i4j. Find a vector that is twice the length and points in the opposite direction as v. i+ j

5-Find a unit vector in the same direction as the given vector. a=4i8j u= i+ j