A man travelling onf(x, y) = sin(xy). His shadow passing through the o – McqOptions

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1.	A man travelling onf(x, y) = sin(xy). His shadow passing through the origin in a straight line (sun travels with him overhead). What is the slope of the line travelling on which would lead him to the lowest elevation.
A.	There isn’t such a line
B.	1
C.	-1
D.	0
Answer» B. 1

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