$\text { Given } f ( x , y ) = x \cos y \text {, use the total differential to approximate } \Delta z \text { at } ( 2,4 )$

question 56

Multiple Choice

$\text { Given } f ( x , y ) = x \cos y \text {, use the total differential to approximate } \Delta z \text { at } ( 2,4 )$ towards $( 2.4,1.05 )$ . Round your answer to four decimal places.

• A)-35.7266
• B)30.5500
• C)17.2734
• D)15.5468
• E)-4.7266

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