1 + cos^2a = 2(cos^4a+sin^4a)

John and jean are married and decide to open three separate accounts for their money. what is the most likely reason for their decision? a.they have too much money and can’t keep it in a single account. b.john and jean are part of a dual-income family. c.the bank does not allow more than one person to open an account. d.they want someone else to handle their finances.