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How do I plot this vector function

F(x,y) = i + cos x j where i and j are unit vectors

Spose I take

x = 0, then the components in i and y direction are 1, 1

x = pi/4, then " " 1, 1/sq rt 2

x = pi/2 " " 1, 0

This doesnt look corect

TIA

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# How to plot vector function

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