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Homework Help: Could anyone check that for me

  1. Apr 5, 2004 #1
    could anyone check that for me plz

    Hiiiiiiiiiii everyone
    I've these two waves
    y1=3sin(kx-wt)
    y2=4cos(kx+wt)
    I need to find the resultant wave (y1+y2)
    I got that answer:

    y= 7 cos(wt+45) sin(kx+45)
    is that right?? plz if not give me a hint

    bye bye
     
  2. jcsd
  3. Apr 5, 2004 #2

    HallsofIvy

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    Science Advisor

    How about giving us some ideas as to HOW you got that and why you think it might be right.
     
  4. Apr 5, 2004 #3
    here is my EFFORTS

    I added the amplidtude mathematically
    then using trigonometric rules i added the two "sin" and "cos" functions

    sin(a)+sin(b)=sin((a-b)/2)cos((a+b)/2)....or something like that

    BYE BYE...i still need to know if my answer is true

    bYYyYyyyYYyYYyYE
     
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