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#102152 wave function

Posted by ionaw on 20 May 2009 - 12:12 PM in Mathematics

QUOTE (Marcus @ Apr 30 2009, 05:07 PM) <{POST_SNAPBACK}>
they should get the same answer, I think I know where you made the mistake.

sin(x+53.3)=-1 (you may have got 53.1 here)...now sine equals -1 not at 180deg like cosine, but instead at 270deg
x+53.3=270 (and I think you forgot to change side; change sign)
x=216.7deg which is the same


i didnt get 53.3, i had 53.1 instead.
i have the method right for the second part though, thats what i was worried about.
Thanks. x smile.gif



#102037 Virtual Physics

Posted by ionaw on 09 May 2009 - 11:13 AM in Physics

could someone please send me the files, i would really appreciate it! ??



#102036 Higher 2009

Posted by ionaw on 09 May 2009 - 10:38 AM in Mathematics

hey, cool.gif i sitting higher ths year, and trying to get a B.
what you hopin for?



#102015 wave function

Posted by ionaw on 29 April 2009 - 08:59 PM in Mathematics

was just wonderin if the solution above gave you the right answer, cause i got something different?

EDIT; how did you know to use kcos(x-a) and not ksin(x+a)?
because i used ksin(x+a) and got the answer of 233.1[degrees]-- is that just a stupid mistake? :/