Let W = 3x Cos Y $x = u ^ { 2 } + v ^ { 2 }$

question 41

Essay

Let w = 3x cos y.If $x = u ^ { 2 } + v ^ { 2 }$ $y=v / \mathcal u_{1}$ find $\partial$ w/ $\partial$ u and $\partial$ w/ $\partial$ v at the point $( u , v ) = ( 2,3 )$ .Give your answers to 2 decimal places.

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