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Algebra · Simplifying

Simplify e^(I·x) + e^(-I·x)

e^{- i x} + e^{i x}

Step by step

  1. e^{i x} + e^{- i x}

    Start from the expression.

  2. 2 \cos{\left(x \right)}

    Simplify.

Reveal the answer
2 \cos{\left(x \right)}