Finding the acute angle between two lines (or between two vectors

If we want to find the acute angle between two lines, we can convert the lines to standard vector form and then use the formula cos(theta)=(a•b)/(|a||b|), where a and b are the given vectors, a•b is the dot product of the vectors, |a| is the magnitude of the vector a (i

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Finding the acute angle between two lines (or between two vectors

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