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!

Trig identity and equation

  1. Oct 26, 2008 #1
    1. The problem statement, all variables and given/known data

    cos(squared)x = sinx-1/2

    2. Relevant equations

    cos(squared)x= 1-sin(squared)x

    3. The attempt at a solution

    I tried everything but my answer does not match my answers in calculator
     
  2. jcsd
  3. Oct 26, 2008 #2
    If [tex]cos^2(x) = sin(x)-0.5[/tex] and [tex]cos^2(x) = 1-sin^2(x)[/tex], then wouldn't you agree that [tex]sin(x)-0.5 = 1-sin^2(x)[/tex]? That's a quadratic equation.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Trig identity and equation
  1. Trig identities (Replies: 10)

  2. Trig Identities (Replies: 8)

  3. Trig Identities (Replies: 18)

Loading...