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!

Homework Help: Help with identities math problem?

  1. Jan 19, 2010 #1
    The question asks you to simplify sin(3pi/2+x).

    I know that you've got to use the sin(a+b)=sinacosb+cosasinb

    but I'm not sure how to solve it when it's not a special triangle.

    Any help is much appreciated.
  2. jcsd
  3. Jan 19, 2010 #2
    Nevermind, figured out my silly mistake.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook