Question

Eliminate the parameter. x = 5 cos t, y = 5 sin t .

Answer 1

Hello,
x=5 cos t and y=5 sin t are the parametric equations of the circle of center (0,0) with radius=5

x²=25*cos²t
y²=25*sin²t
x²+y²=25(cos²t+sin²t)
==>x²+y²=25