Let $f(x,y)=3sin(x+y^2)+cos(y-x).$ Calculate gradf.

gradf$(x,y)=($:$,$:$)$

What $is$ the directional derivative $ofz=f(x,y)=3sin(x+y^2)+cos(y-x)in$ the direction $of$ the vector vec$(v)=-2i+3j?$ Put your formula into either exact form, $or$ round all numerical values $toat$ least $3$ decimal places.

$f_{\text{v}\text{e}\text{c}(v)}(x,y)=$

What $is$ the directional derivative $ofz=f(x,y)=3sin(x+y^2)+cos(y-x)at$ the point $(-3,-5)in$ the direction $of$ the vector vec$(v)=-2i+3j?$ Round your answer $toat$ least $3$ decimal places.

$f_{\text{v}\text{e}\text{c}(v)}(-3,-5)=$