- #1

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**i have a problem plz help**

http://img373.imageshack.us/img373/3052/index1bd9.gif [Broken]

Who can solve this for me?!?!?!

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- Thread starter heyman123
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- #1

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http://img373.imageshack.us/img373/3052/index1bd9.gif [Broken]

Who can solve this for me?!?!?!

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- #2

berkeman

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What are your thoughts on how to approach this problem?

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- #4

Defennder

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Is that a logarithm of base 10 or the natural logarithm?

- #5

Defennder

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- #6

Dick

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Integrate by partial fraction.

- #8

rock.freak667

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how come if you change from pi to pi/2, the integral is doubled? I get that if the integrand was just sinx but isn't lnsinx something entirely different?

- #9

Dick

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- #10

rock.freak667

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oh ok then...I thought the graphs were very different.

- #11

Dick

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- #12

rock.freak667

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I only solved it based on your hints but I didn't know it was symmetric at pi/2. But how you knew to change the limits of integration beats me

- #13

Dick

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- #14

HallsofIvy

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Surely, you didn't get to where you are being expect to solve problems like this without learning that the derivative of cos x is -sin x??

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Surely, you didn't get to where you are being expect to solve problems like this without learning that the derivative of cos x is -sin x??

We already answered this below!

https://www.physicsforums.com/showthread.php?t=240644

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