If sin A + sin² A = 1 , then cos² A + cos⁴ A = ?

If sin A + sin² A = 1 , then cos² A + cos⁴ A = ?
(A) 2
(B) 1
(C) -1
(D) More than one of the above
(E) None of the above
#bpsctre #bpsc #maths # trigonometry