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    Complex Trigonometric Substitution

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    Given that

    e ^ jx + e ^ -jx e ^ jx - e ^ -jx
    Cos x = ----------------------, Sin x = --------------------
    2 2j

    using only this information, prove that

    Cos^2 x - Sin^2 x = 1 - 2 Sin^2 x

    © BrainMass Inc. brainmass.com March 4, 2021, 7:59 pm ad1c9bdddf
    https://brainmass.com/math/trigonometry/complex-trigonometric-substitution-137169

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    A proof for a complex trigonometric substution is provided.

    $2.49

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