السؤال 4 of f(x, ) = in(ex cos(m), then which of the following combination is correct...

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Question

Answer 1

Answer #1

f(x, y) = In ( ex Cosy) if(x,y) 2 Cosy fa (x,y) (a Cosy) = Cosy ax fy (x, y) a (a Cosy) = -xsiny - ay (ay) from - a C Cosy) =

Answer 2

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