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The expression 2/(e^x - e^(-x)) represents which hyperbolic function?
Acsch x
Bsech x
Ctanh x
Dcoth x
Answer & Solution
Correct answer: A. csch x
Since sinh x = (e^x - e^(-x))/2, its reciprocal is 2/(e^x - e^(-x)), which is csch x.
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