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-   -   How to prove that ? (https://www.askmehelpdesk.com/showthread.php?t=566610)

  • Mar 30, 2011, 08:10 AM
    supun
    How to prove that ?
    sin^6(x) + cos^6(x) = sin^4(x) - sin^2(x) * cos^2(x) + cos^4(x)
  • Mar 30, 2011, 09:22 AM
    smoothy

    How do you think you should start?





    Read this first: Expectations for the Homework Help board

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  • Mar 31, 2011, 07:47 AM
    galactus

    Look at the factorization for the sum of two cubes.

    Factor:



    Let

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