Maclaurin Series for sinh(x): What are the first three non-zero terms?

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The first three non-zero terms of the Maclaurin series expansion for sinh(x) are x, 1/6 x^3, and 1/120 x^5. This series accurately represents the function near x = 0. Users confirmed the correctness of these terms, and verification through Google was suggested. The discussion emphasizes the importance of understanding series expansions in calculus. The Maclaurin series provides a useful approximation for sinh(x) in mathematical analysis.
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Determine the first three non-zero terms of the Maclaurin’s series expansion for:
f (x) = sinh(x)

Would the answer to this be: x + 1/6x^3 + 1/120x^5
 
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That is correct. (You could also check your answer via Google.)
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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