Quick Easy wave question

  1. This has nothing to do with homework, so I hope this is OK

    (I graduated college in 07 :) )

    How do you draw one wave lagging another by 90 degrees?

    My girlfriend and I can't remember how to draw this out.
     
  2. jcsd
  3. wooooow, nevermind

    that was extremely obvious
    hahahaha
     
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