1. Limited time only! Sign up for a free 30min personal 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!

Simple Trig Question

  1. May 23, 2009 #1
    Hi,

    I'm just stumped on how to solve the following type of trig equation. Could someone show working / a tutorial on how to solve similar equations. I'm fine with simple ones like: 4 + sinx = 3 , but this style has me stumped:

    sin(x + 30) = 1
    or

    tan(x + 45) = 1

    Thanks!
     
  2. jcsd
  3. May 23, 2009 #2

    Gib Z

    User Avatar
    Homework Helper

    Try letting u = x + 30 in the first one, or u= x+45 in the second one. Then, solve it just like you are used to and you attain your values for u. You know the relation between u and x, easy. =]

    EDIT: I didn't realize this wasn't the homework forum when I posted. From now on, please only ask homework style questions in the Homework Help forum.
     
  4. May 24, 2009 #3
    sin(x + 30) = 1

    ( x + 30 ) = 90

    x = 90 - 30

    x = 60
     
  5. May 24, 2009 #4
    x = 60 + 2k pi

    edit: oh wait, in degrees that is:
    x = 60 + 360k

    Where k is any whole number.

    Because sine is repetitive every 360 deg or 2pi rad.
     
  6. May 24, 2009 #5
    opps yea you are right ,forgot to include that =.=
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Simple Trig Question
  1. Trig question (Replies: 1)

  2. Trig question (Replies: 5)

  3. Simple trig question (Replies: 6)

Loading...