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Pre Cal

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Sec^2 2u-1/Sec^2 2u = Sin^2 2u

  • Pre Cal -

    since all angles are 2u , let Ø - 2u for ease of typing

    I will assume you are proving this as an identity

    LS = (1/cos^2 Ø - 1)/(1/cos^2 Ø)
    = (1 - cos^2 Ø)/cos^2 Ø * (cos^2 Ø)
    = 1 - cos^2 Ø
    = sin^2 Ø
    = RS

    replace Ø with 2u if you have to

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