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The Letters X and Y Represent Rectangular Coordinates $y = x$

Question 125

Multiple Choice

The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, θ) .
- $y = x$

A) $r = \cos \theta$
B) $\sin \theta = \cos \theta$
C) $\sin \theta = - \cos \theta$
D) $r = \sin \theta$

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