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June 10th, 2017, 12:13 AM   #11
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Quote:
Originally Posted by skeeter View Post
could this statement mean $m$ and $n$ are unit vectors that are not orthogonal?

if so ...

$e = \left(2-\dfrac{1}{\sqrt{2}}\right)i - \left(\dfrac{1}{\sqrt{2}}\right)j$

$f = \left(4-\dfrac{5}{\sqrt{2}}\right)i - \left(\dfrac{5}{\sqrt{2}}\right)j$

however, this makes $|e \times f| = 3\sqrt{2}$

?
Yes they are not orthogonal. But still the answer is the same as mine not theirs.
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