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QUESTION
Which of the following is an identity? A. csc^2x+cot^2x=1 B. (cscx + cotx)^2=1 C. sin^2x sec^2x + 1=tan^2x csc^2x D. sin^2x - cos^2x=1 I REALLY NEED the answer IMMEDIATELY!
Which of the following is an identity?
A. csc^2x+cot^2x=1
B. (cscx + cotx)^2=1
C. sin^2x sec^2x + 1=tan^2x csc^2x
D. sin^2x - cos^2x=1
I REALLY NEED the answer IMMEDIATELY!
