Question

Which of the following is not an identity?

A. cos^2 x cscx-cscx= -sinx
B. csc^2x + sec^2x = 1
C. sinx(cotx + tanx) = secx
D. cos^2x - sin^2x = 1- 2sin^2x

Answer 1

The Answer is B.

Explanation:

I just had this question and the answer came out as B