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Mathematics 16 Online
kekeman:

Math: https://snipboard.io/EpFUyn.jpg

kekeman:

Its not option D.) which is V

kekeman:

I was thinking Q

kekeman:

@surjithayer

kekeman:

Which of the following represents the polar equation r = (cot 2θ)(csc θ) as a rectangular equation? x2 + y2 = 1 y = 1 y2 = x3 y3 = x2

kekeman:

Its either y2 = x3 or y3 = x2

surjithayer:

\[r \sin \theta=\frac{ \cos 2\theta }{ \sin 2\theta }\] \[y=\frac{ \cos ^2\theta-\sin ^2\theta }{ 2\sin \theta \cos \theta }=\frac{ r^2\cos ^2\theta-r^2\sin ^2\theta }{ 2(r \sin \theta)(r \cos \theta)}=\frac{ x^2-y^2 }{ 2xy }\] \[2xy^2=x^2-y^2,x^2=(2x+1)y^2,y^2=\frac{ x^2 }{ 2x+1}\] no option matches this answer. if question is \[r=\cot ^2\theta \csc \theta \] \[r \sin \theta=\frac{ \cos ^2\theta }{ \sin ^2\theta }=\frac{ r^2\cos ^2\theta }{ r^2\sin ^2\theta }\] \[y=\frac{ x^2 }{ y^2 },y^3=x^2\]

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