Parametric form of parabola y=2+4t and x=−2+2t2 ⇒‌‌t=‌
y−2
4
,x+2=2t2 or (y−2)2=8(x+2) Comparing with (y−k)2=4a(x−h) a=2 and h=−2 and k=2 Ends of latus rectum L(a+h,k+2a) and L′(a+h,k−2a) =L(0,6) and L′(0,−2) ⇒‌‌α=‌