SOLUTION: Determine whether of the following may be or it not an indentity. (1+sin(x))(1-sin(x))=cos^2(x)

Algebra ->  Trigonometry-basics -> SOLUTION: Determine whether of the following may be or it not an indentity. (1+sin(x))(1-sin(x))=cos^2(x)      Log On


   

Question 398311: Determine whether of the following may be or it not an indentity.
(1+sin(x))(1-sin(x))=cos^2(x)
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
This is an identity, because %281%2Bsin+x%29%281-sin+x%29+=+1-sin%5E2+%28x%29++=cos%5E2+%28x%29.