(a)
To find: The component form of the
(a)
Answer to Problem 21RE
The component form of the vector
Explanation of Solution
Given information:
The vector
Formula Used:
The component form of a vector
Calculation:
Substitute
Therefore, the component form of the vector
(b)
To find: The magnitude of vector
(b)
Answer to Problem 21RE
The magnitude of vector
Explanation of Solution
Given information:
The vector
Formula used:
The magnitude of any vector
Calculation:
As calculated in part (a), the component form of the vector
Substitute
Therefore, the magnitude of vector
(c)
To find: A unit vector in the direction of
(c)
Answer to Problem 21RE
The unit vector in the direction of
Explanation of Solution
Given information:
The vector
Formula used:
The unit vector in the direction of vector
Calculation:
As calculated in part (a), the component form of the vector
As calculated in part (b), the magnitude of the vector
Substitute
Therefore, the unit vector in the direction of
Chapter 10 Solutions
Precalculus with Limits: A Graphing Approach
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