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Which function equals coth^2 x - 1?
Asech^2 x
Bsinh^2 x
Ccsch^2 x
Dtanh^2 x
Answer & Solution
Correct answer: C. csch^2 x
Dividing cosh^2 x - sinh^2 x = 1 by sinh^2 x gives coth^2 x - 1 = csch^2 x.
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