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-   -   Verify cos^2(2t)+4sin^2(t) = 4sin^4(t)+1 (https://www.askmehelpdesk.com/showthread.php?t=744413)

  • Apr 15, 2013, 10:31 AM
    Dan0655
    Verify cos^2(2t)+4sin^2(t) = 4sin^4(t)+1
    Math problem
  • Apr 15, 2013, 11:24 AM
    ebaines
    Hints:

    (sin^2t + cos^2t)^2 = 1

    cos^2(2t) = (cos^2t - sin^2t)^2

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