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Thread: Integral question

  1. #1 Integral question 
    Forum Ph.D. Heinsbergrelatz's Avatar
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    Okay before i pose this problem, there are quite a number of people who see my question as "not well- posed...." Well on the contrary this question is pretty straightforward and does not require much to say(But still stuck on).

    this is an indefinite integral problem:



    The problem i have here is that i failed to recognize the proper substitution for the function. So i completely ignored substitution and just used integration by parts, and i get a whacky answer, rather messy actually. Im very sure there is a substitution for this, can anyone spot it?? Of course after the substitution the computation is easy.

    i would appreciate any help.


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  3. #2  
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    Where do dredge up this stuff!?

    Wolfram's calculator if you're interested.


    Wise men speak because they have something to say; Fools, because they have to say something.
    -Plato

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  4. #3  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    Where do dredge up this stuff!?

    Wolfram's calculator if you're interested.
    if i wanted the answer, i could just turn to the back of my book. Obviously im looking for clues to how to solve the problem.
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  5. #4  
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    Quote Originally Posted by Heinsbergrelatz
    Where do dredge up this stuff!?

    Wolfram's calculator if you're interested.
    if i wanted the answer, i could just turn to the back of my book. Obviously im looking for clues to how to solve the problem.
    Triginometric substitutions.
    Wise men speak because they have something to say; Fools, because they have to say something.
    -Plato

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  6. #5  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    Triginometric substitutions
    There are alot of trigo. substitutions that i am aware of, pluggin in everything would take to much time. Can you narrow it down alittle further?

    thanks
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