Question

( begin{aligned} frac{partial(u, v)}{partial(x, y)} &=left|begin{array}{cc}frac{partial 0}{partial x} & frac{partial v}{partial y} frac{partial v}{partial x} & frac{partial v}{partial y}end{array}right| &=-4 operatorname{arcs} y-4 sin y &=-8 text { abny } A y end{aligned} )

# if u =(ax? +by?), v = (ax? - by?) than find a(u, v) Ə(x, y)

Solution