QuestionConvert the following polar coordinates to rectangular coordinates equations. (Here $a$ is a constant number.) $r=a$ $\square$ $r=a \sec (\theta)$ $\square$ $r=a \csc (\theta)$ $\square$ $r=2 a \sin (\theta)$ $\square$ $r=2 a \cos (\theta)$ $\square$ $r=a \sec (2 \theta)$ $\square$ $\theta=\frac{\pi}{4}$ $\square$
Drag or tap the options below to fill in the blanks $$\left.x^{2}-y^{2}=a y=a y=x x^{2}+(y-a)^{2}=a^{2} x=a\right)^{2}+y^{2}=a^{2} x^{2}+y^{2}=a^{2}$$