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sat_chen

  • one year ago

stuck at this part in trig substitution

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  1. sat_chen
    • one year ago
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    |dw:1359527135188:dw|

  2. sat_chen
    • one year ago
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    |dw:1359527165469:dw|

  3. sat_chen
    • one year ago
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    am i missing something simple here?

  4. RadEn
    • one year ago
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    |dw:1359527286359:dw|

  5. dumbcow
    • one year ago
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    for sin^2 and cos^2 .... use integration by parts u = cos dv = cos du = -sin v = sin you will have to repeat it again

  6. sat_chen
    • one year ago
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    ah of course the infamous half aangles

  7. dumbcow
    • one year ago
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    haha or that

  8. sat_chen
    • one year ago
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    yea i knew there was a way to do this simper then the u substitution but douldnt figure out what it was

  9. dumbcow
    • one year ago
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    sorry i learned it the hard way and it always stuck with me

  10. sat_chen
    • one year ago
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    its all good but its better in life to take easier route :P

  11. sat_chen
    • one year ago
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    when you can of course

  12. sat_chen
    • one year ago
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    ty again guys

  13. sat_chen
    • one year ago
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    wait a second i thought about it you cant use the u substitution

  14. sat_chen
    • one year ago
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    you only have the 1 trig ffunction at one time so you could have only done that

  15. sat_chen
    • one year ago
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    half angle formula

  16. dumbcow
    • one year ago
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    correct , "u-substitution won't work" i used "integration by parts"

  17. dumbcow
    • one year ago
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    http://en.wikipedia.org/wiki/Integration_by_parts

  18. sat_chen
    • one year ago
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    ah i see i zoned out the dv part yep it would work

  19. sat_chen
    • one year ago
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    and i did integration by parts like 1 week ago

  20. dumbcow
    • one year ago
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    oh ok

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