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A real number x satisfies sinh x = 3/4. What is cosh x?
A4/3
B7/4
C3/5
D5/4
Answer & Solution
Correct answer: D. 5/4
cosh^2 x = 1 + 9/16 = 25/16, and cosh x is always positive, so cosh x = 5/4.
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