Write down a parametric form of the circle centered at (?1; 2) with radius 3. indicate the parameter interval that you used.

Parametric form of a circle is x = h + r cos t, y = k + r sin t where (h, k) is coordinates of the center of the circle. r is the radius

so for this circle the equations are

x = 1 + 3 cos t and y = 2 + sin t