
Concept explainers
(a)
The distance between the cow A and cow B.
(a)

Answer to Problem 73AP
The distance between the cow A and cow B is
Explanation of Solution
The figure 1 below shows the location of the cow A, cow B and the person.
Use the law of cosine to write the formula for the sides a, b, and c.
The distance between the cows is the side
It is given that,
Conclusion:
Substitute
The distance between the cow A and cow B is
(b)
The angle between the person and cow B as seen by the cow A.
(b)

Answer to Problem 73AP
The angle between the person and cow B as seen by the cow A is
Explanation of Solution
The figure 1 below shows the location of the cow A, cow B and the person.
Use the law of cosine to write the formula for the sides a, b, and c.
The angle between the person and cow B as seen by cow A is the angle
Re-write the above equation to get an expression for
It is given that,
Conclusion:
Substitute
The angle between the person and cow B as seen by the cow A is
(c)
The angle between the person and cow A as seen by the cow B.
(c)

Answer to Problem 73AP
The angle between the person and cow A as seen by the cow B is
Explanation of Solution
The figure 1 below shows the location of the cow A, cow B and the person.
Use the law of cosine to write the formula for the sides a, b, and c.
The angle between the person and cow A as seen by cow B is the angle
Re-write the above equation to get an expression for
It is given that,
Conclusion:
Substitute
The angle between the person and cow A as seen by the cow B is
(d)
The angle between star B and sun as observed by an inhabitant of a planet orbiting star A.
(d)

Answer to Problem 73AP
The angle between star B and sun as observed by an inhabitant of a planet orbiting star A is
Explanation of Solution
The figure 2 below shows the location of the star A, star B and the sun S.
Use the law of cosine to write the formula for the sides a, b, and c.
The angle between the person and cow A as seen by cow B is the angle
Re-write the above equation to get an expression for
It is given that,
Conclusion:
Substitute
The angle between star B and sun as observed by an inhabitant of a planet orbiting star A is
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Chapter 1 Solutions
Physics for Scientists and Engineers with Modern, Revised Hybrid (with Enhanced WebAssign Printed Access Card for Physics, Multi-Term Courses)
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