Plot the point in the polar coordinates and find three additional polar representations.
Answer to Problem 17E
Additional polar representations are
Explanation of Solution
Given:
Consider thepolarcoordinateas:
So,thedirecteddistancefromoriginis:
Also,thedirectedangleis:
Convertthisintopiradianas:
Now,drawthispolarcoordinateinxy-planeas below.FirstConsider theangle.So,astheangleis negative,sothecountofanglewillbeclockwise.So,theconsideredanglewillbeas below:
Now,thedirected distanceis−3.So,forthenegativesignthevectorwillbeonthejustoppositetothedottedlinementionedabove.So,thevectorwillbeas below:
Now,findthetwoadditionalpolarrepresentationsof the points
So,Consider thepositiveangle.But,theangleisclockwise.So,thedirectedanglewillbe:
Convertintoradianas:
Now,angleispositiveandtheplotisclockwise.So,thevalueofrisnegative.So,thedirecteddistanceis:
So,thepolarcoordinateis:
So,Consider thepositiveangle.So,theanglewillbeanticlockwise.So,thedirectedanglewillbe:
Convertintoradianas:
Now,angleispositiveandtheplotisanticlockwise.So,thevalueofrispositive.So,thedirecteddistanceis:
So,thepolarcoordinateis:
Chapter 10 Solutions
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