Find the Angle Between the Lines $\frac { x - 2 } { 1 } = \frac { 1 - y } { 3 } = \frac { z - 3 } { 1 }$

question 212

Essay

Find the angle between the lines $\frac { x - 2 } { 1 } = \frac { 1 - y } { 3 } = \frac { z - 3 } { 1 }$ and $\frac { x } { 2 } = \frac { y + 3 } { - 1 } = \frac { z - 1 } { 2 }$ .

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