
Parviz F. answered 12/17/13
Tutor
4.8
(4)
Mathematics professor at Community Colleges
X = (cos ^2) X +( sin^2) =1 / Make use of this identity
X = cosX Y = 4 Sin X Y/4 = SinX
then:
X2 + Y^2/16 = 1 ( is a equation of Ellips with center at origin for points are (1,0) (-1,0) & ( 0,4)
( 0,-4)