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which statements are true select all that apply

A) tan^2 theta=1-sec^2theta
B) cos theta= cot theta/ csc theta
C) 1/ sec^2 theta= sin^2 theta +1
D) sec^2 theta-1= 1/ cot^2 theta
E) sin theta csc theta= tan theta

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A) tan^2 theta=1-sec^2theta
C) 1/ sec^2 theta= sin^2 theta +1

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