Efficient Integration of sinh(2x) cosh(2x) with Step-by-Step Homework Solution

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The integral of sinh(2x) cosh(2x) can be solved by using the substitution u = sinh(2x), leading to du = 2 cosh(2x) dx. The integral simplifies to 1/2 ∫ u du, resulting in (sinh(2x))^2 / 4. A noted typo in the differentiation process was the omission of "dx" in the expression for du. Additionally, the integration constant was not included in the final answer, which is essential for completeness. Verifying the solution by differentiating is recommended to ensure accuracy.
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Homework Statement


int sinh(2x) cosh(2x) dx


u= sinh (2x)
du= 2 cosh (2x)

1/2 int u du

1/2 (u^2)/2

(sinh (2x))^2 / 4
 
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Looks just fine, except for one little typo where you wrote
du= 2 cosh (2x)
instead of
du= 2 cosh (2x) dx

And you forgot the integration constant :-p
 
Why don't you differentiate your answer and see if you got what you started with...
 
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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