GATE ECE 2014 Set 3 | Question: 53

Question

Given the vector $\textbf{A}= ( \cos x ) ( \sin y  )\hat{a_{x}}+( \sin x )( \cos y )\hat{a_{y}},$ where $\hat{a_{x}},$ $\hat{a_{y}}$ denote unit vectors along $x$, $y$ directions, respectively. The magnitude of curl of $\textbf{A}$ is __________