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Simple trigonometry

  1. Jun 9, 2007 #1
    Simple trigonometry....

    Just some simple Trigonometry.....

    If sin x = 1/2, then what is sin (x + (pi/4)), if x is greater than or equal to 0 and less or equal to pi over 2?

    Method?
     
  2. jcsd
  3. Jun 9, 2007 #2

    Doc Al

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    Staff: Mentor

    Start by figuring out all the values of x that satisfy sin x = 1/2 (between 0 and pi/2). (There's only one.)
     
  4. Jun 9, 2007 #3
    It specifies do not use calculator or log tables.......
     
  5. Jun 9, 2007 #4

    Doc Al

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    Staff: Mentor

    I presume you are expected to know the properties of some special right triangles and special angles? (For example: a 3-4-5 right triangle)

    You need some facts at your disposal to get started.
     
  6. Jun 9, 2007 #5
    I'm not sure. I haven't seen a question like this one before. So basically I have to know the properties of the triangle? I can draw one with the sin = 1-2 to part.....but where from there???
     
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