math ---reflection problem

y = √(25 - x²) ...........(y ≥ 0) y² = 25 - x²x² = 25 - y² x = √(25 - y²)The reflected equation of y = √(25 - x²) , (x² ≤ 25) is :y = √(25 - x²) , (x ≥ 0)


2010-09-22 22:06:01 補充：
It should be :

y = √(25 - x²) ...........(y ≥ 0)

y² = 25 - x²

x² = 25 - y²

x = ±√(25 - y²)

The reflected equation of y = √(25 - x²) , (x² ≤ 25) is :

y = ±√(25 - x²) , (x ≥ 0)