Statements P and Q contain equations. Decide whether neither, either, or both of these are identities and then choose the appropriate answer below.
P: csc^2 x - cot^2 x = 1.
Q: tan^2 x - sec^2 x = 1
A) Only statement P is an identity
B) Only statement Q is an identity
C) P and Q are both identities
D) Neither P nor Q are identities