Let u=⟨u1,u2⟩ and v=⟨v1,v2⟩ be two-dimensional vectors. The cross product of vectors u and v is not defined. However, if the vectors are regarded as the three-dimensional vectors u~=⟨u1,u2,0⟩ and v~=⟨v1,v2,0⟩, respectively, then, in this case, we can define the cross product of u~ and v~. In particular, in determinant notation, the cross product of u~ and v~ is given by
u~×v~=∣iu1v1ju2v2k00∣.
Use this result to compute (icosθ+jsinθ)×(isinθ−jcosθ), where θ is a real number.