Question $4$

Find the Jacobian $\frac{\text{d}\text{e}\text{l}(x,y)}{\text{d}\text{e}\text{l}(u,v)}$ for the following change of variables:

$x=9$ucos$()-3$vsin$(),y=9$usin$()+3$vcos$()$

$72$

$-54$

$27$

$-27$