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Math Help - Antidfferentiation Of trigonometry functions

  1. #1
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    Antidfferentiation Of trigonometry functions

    antidifferentiate sin(3x-pi/4) :using a pen and paper, I got (-1/3)cos(3x-pi/4) + c. I also tried it on ti-89 titanium and I got an answer that i think is incorrect.Here is a screen shot: so my question is, can we say the ti 89 answer is also correct?
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  2. #2
    Eater of Worlds
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    Yes, you are both correct. Just in different forms.

    You should know that cos(x-\frac{\pi}{4})=sin(x+\frac{\pi}{4})
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by galactus View Post
    Yes, you are both correct. Just in different forms.

    You should know that cos(x-\frac{\pi}{4})=sin(x+\frac{\pi}{4})
    Well I would say that the calculator is wrong or rather incomplete as it has dropped the arbitary constant, but this appears to be a common feature of some CAS's

    RonL
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  4. #4
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by CaptainBlack View Post
    Well I would say that the calculator is wrong or rather incomplete as it has dropped the arbitary constant, but this appears to be a common feature of some CAS's

    RonL
    You can make the constant appear:



    --Chris
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  5. #5
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    I want to thank you all guys for your great contributions.It's much appreciated.
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