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-   -   write the expression in terms of a single trig. Function (https://www.askmehelpdesk.com/showthread.php?t=659814)

  • May 12, 2012, 09:30 PM
    crmedina23
    write the expression in terms of a single trig. Function
    cos^2 2 theta-sin^2 2 theta
  • May 13, 2012, 06:50 PM
    ebaines
    Quote:
    Originally Posted by crmedina23 View Post
    cos^2 2 theta-sin^2 2 theta
    Hint: remember the identity for cos(2x): one version is cos(2x) = cos^2x - sin^2x

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