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Find an Equivalent Equation in Rectangular Coordinates $\mathbf { r } = \cos \theta$

Question 278

Multiple Choice

Find an equivalent equation in rectangular coordinates.
- $\mathbf { r } = \cos \theta$

A) $x ^ { 2 } + y ^ { 2 } = x$
B) $( x + y ) ^ { 2 } = y$
C) $( x + y ) ^ { 2 } = x$
D) $x ^ { 2 } + y ^ { 2 } = y$

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