Parameterize the circle x^2 + y^2 = r^2

[teng125]

parameterize the circle x^2 + y^2 = r^2

anybody pls help
thanx

 

[Gagle The Terrible]

Think about trigonometry and consider your parameter t as the angle between your point and the horizontal line ( the positive x axis).

 

[Mindscrape]

Also, it will be helpful to remember that x=rcost and y=rsint.