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| PAGE: 614 | SET: Exercises | PROBLEM: 12 |
Observe the figure, u represented by directed line segment from 
to 
, and v represented by directed line segment from 
to 
and both are same direction.
(Write distance formula)
(Substitute: 
)
(Simplify)
(Write distance formula)
(Substitute: 
)
(Simplify)
(Write slope formula)
(Substitute: 
)
(Simplify)
(Write slope formula)
(Substitute: 
)
(Simplify)
The magnitude of u and v is same (
), the slope of u and v is same
(
) and its direction is same, so they are equal.
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