# precalculus

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convert the equation y^2 = 2x -x^2 into polar form.

convert the equation r = 2tan(theta) into rectangular form.

I'm not really sure what either of these mean. I vaguely understand polar coordinates, but I'm not sure how to convert equations back and forth between polar and rectangular. Please help =(

• precalculus -

r = tan(θ)
√(x² + y²) = y/x

tan(θ) = y/x
r = √(x² + y²)

x² + y² = 4y²/x²
x^4 + x²y² = 4y²
x^4 + x²y² - 4y² = 0

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