Could someone tell me what I'm doing wrong? thanks!!(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Write the equation is cylindrical coordinates

7x^{2}+ 7y^{2}= 2y

r = ? (has to be in the r = ? format)

2. Relevant equations

r^{2}= x^{2}+y^{2}

x = rcos(θ)

y = rsin(θ)

3. The attempt at a solution

7x^{2}+ 7y^{2}= 2y

7(x^{2}+ y^{2}) = 2y

7(r^{2}= 2rsin(θ)

r^{2}= (2rsin(θ))/7

r = sqrt((2rsin(θ))/7)

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# Homework Help: Writing equations in cylindrical coordinates (need work checked again please)

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