1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Clarification of RSin(x+a), RCos(x+a)

  1. Jan 4, 2009 #1
    1. The problem statement, all variables and given/known data
    I want to clarify about using RSin(x+a) and RCos(x+a) for aSinbx + cCosbx

    If im given y = 3Sin2x + 4cos2x

    Can I turn it into RSin(x+a) and RCos(x+a) expressions

    HOWEVER

    if y = 3Sin2x + 4cos4x Can I turn it into RSin(x+a) and RCos(x+a) expressions?

    Thanks :)
     
  2. jcsd
  3. Jan 4, 2009 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    No, you can't. Try plotting that function. It doesn't look very much like a simple sin or cos graph, does it?
     
  4. Jan 4, 2009 #3
    is that for

    if y = 3Sin2x + 4cos4x

    what about:

    "I want to clarify about using RSin(x+a) and RCos(x+a) for aSinbx + cCosbx

    If im given y = 3Sin2x + 4cos2x

    Can I turn it into RSin(x+a) and RCos(x+a) expressions"

    or can you only do one or the other (either RSin(x+a) and RCos(x+a)) and you have to spot each one


    Thanks :)
     
  5. Jan 4, 2009 #4

    rock.freak667

    User Avatar
    Homework Helper

    For asinbx+cCosbx, once those 'b's are the same, you can turn it into either Rsin(bx+A) or Rcos(bx+A).
     
  6. Jan 5, 2009 #5
    cool cheers :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Clarification of RSin(x+a), RCos(x+a)
  1. Nast y = RSin(x + a) (Replies: 5)

  2. X + a =? (Replies: 3)

  3. Derivative of X^(x^x)? (Replies: 1)

Loading...