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| PAGE: 540 | SET: Exercises | PROBLEM: 36 |
Given that 
Find the magnitude.
(Apply distance formula)
(Substitute 
)
(Product of two same signs is positive)
(Evaluate powers)
(Add: 
)
(Use a calculator)
Graph 
to determine how to find the direction.Draw a right tringle that has 
as its hypotenuse and an acute angle at 
.
(Substitute 
)
(Simplify)
(Divide)
(Use a calculator)
The direction of is 
or about 
.
The magnitude of is about 2.3 and a direction of about 
.
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