Algebra II

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Multiple Choice
Which expression is NOT equivalent to 1? (theta) means 0 with dash in it.

A.)sin^2 (theta)+cot^2 (theta) sin^2 (theta)
B.)(sin^(theta))/(1-cos(theta))-cos(theta)
C,)sec^2 (theta)+ tan^2 (theta)
D.)(cot^2(theta) sin^2 (theta))/(cos^2(theta))

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