The gradient vector field of f(x,y)=cos(x) - 2sin(y) is: O1. f(x,y)= cos(x) i - 2sin(y) j II. f(x,y)=-sin(x) i - 2cos(y) j III. f(x,y)= sin(x)i - 2cos(y) j ON.f(x.y)=-sin(x) i + 2cos(y) j

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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The gradient vector field of f(x,y)=cos(x) - 2sin(y) is:
O1. f(x,y)= cos(x) i - 2sin(y) j
II. f(x,y)=-sin(x) i - 2cos(y) j
III. f(x,y)= sin(x) i - 2cos(y) j
IV. f(x,y)=-sin(x) i+ 2cos(y) j
Transcribed Image Text:The gradient vector field of f(x,y)=cos(x) - 2sin(y) is: O1. f(x,y)= cos(x) i - 2sin(y) j II. f(x,y)=-sin(x) i - 2cos(y) j III. f(x,y)= sin(x) i - 2cos(y) j IV. f(x,y)=-sin(x) i+ 2cos(y) j
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