Need help verifying an identity?

Question

Hint: write cos2a as cos(a+a)

cos 2a= cos^2a-sin^2a

Answer 1

To Anyone:

Can you verify the identity of a white female that goes by the name of Faith Sarah Smith that lives in Victoria Island. She is 31 years old , blond hair and blue eyes and a citizen of the UK. She may be part of an money fraud scheme with the assistance of Nigerian customs. Please send the information to [e-mail]

Thank you,

Anthony Bonfiglio