A if w f ( x , y ) , where x rcostheta and y rsintheta , show that ( w x ) 2 ( w y ) 2 ( w r ) 2 1 r 2 ( w theta ) 2

Question

A if w   f ( x , y ) , where x   rcostheta and y   rsintheta , show that ( w   x )   2   ( w   y )   2   ( w   r )   2   1   r   2 ( w   theta )   2

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A if w = f ( x , y ) , where x = rcostheta and y = rsintheta , show that ( w /