Convert the rectangular equation below to a polar equation. x² - 7x + y²=0
SOLUTION :
x^2 - 7x + y^2 = 0
To convert to polar coordinates (r, ?) :
we, use the following relationships :
x = r cos ? and y = r sin ?
So,
Given equation becomes :
(r cos ?)^2 - 7(r cos ?) + (r sin ?)^2 = 0
=> (r cos ?)^2 + (r sin ?)^2 - 7(r cos ?) = 0
=> r^2 - 7r cos ? = 0
=> r - 7 cos ? = 0
=> r = 7 cos ? (ANSWER)
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> ? means theta.
Tulsiram Garg Fri, Nov 19, 2021 2:15 AM