Alicia001 Alicia001

25-06-2018
Mathematics

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Polar coordinates of a point are given. Find the rectangular coordinates of the point. (-5, -180°)

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mkryukova19 mkryukova19

25-06-2018

Polar coordinates : r= - 5, α= - 180⁰.
Rectangular coordinates :
x=r*cosα = (-5)*cos (-180⁰)=(-5)*(-1)=5
y=r*sinα = (-5)*sin(-180⁰)=(-5)*0=0

So, (-5, -180°) (polar coordinates) is the same as (5,0) (rectangular coordinates).

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