Posted by Ankur on Monday, August 19, 2013 at 6:52am.
What is the unit vector in R^2 which makes an angle of π4 with both the x and yaxes?

Math  Reiny, Monday, August 19, 2013 at 10:23am
if the angle is supposed to be π/4, then a unit vector in that direction is
(1/√2 , 1/√2) or (√2/2 , √2/2)
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