12/12.13 Vector Analysis

Condition: find \ ((\ nabla \ cdot \ vec {a}) and \ (| \ nabla \ times \ vec {a} | \) for the field of the vector \ (\ vec {a} = (2 x \ vec {\ iMath} +3 y \ vec {\ jmath}+z \ vec {k}) \ cos | \ vec {r} | \), where \ (\ vec {r} \) is the radius of the point.