What is the Integration by Parts Method for Solving Complex Integrals?

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The Integration by Parts method is recommended for solving the integral 2∫_0^1 cosh(πx) cos(nx). This technique is particularly useful for integrating products of functions. Participants in the discussion confirm that this method is appropriate for the given integral. The conversation emphasizes the importance of recalling integration techniques when tackling complex integrals. Overall, Integration by Parts is highlighted as the key approach for this problem.
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I need to integrate 2\int_0^1cosh(\pi x)cosnx

Not asking anyone to do it for me, just what method to use?

Thanks alot.
 
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Use Integration by Parts.
 
Oh yeah, I remember now...Thanks!
 
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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