<3,1> x <4,-5>
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Originally Posted by Mc3 <3,1> x <4,-5> The angle between $\displaystyle \vec{A}~\&~\vec{B}$ is $\displaystyle \arccos \left( {\frac{{\vec{A}\cdot\vec{B}}}{{\|\vec{A}\|~\|\vec{ B}\|}}} \right)$
I tried cos^1 7/ square root 10 x square root 41 but it says error on my calc?
You must have plugged it in wrong to the calculator. It is in the range of arcos.
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