Mathematics, 13.03.2021 05:30 19thomasar

If cos ⁡ x = 2/3 then what is the positive value of cos ⁡ 1/2 x, in simplest radical form with a rational denominator?

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If cos ⁡ x = 2/3 then what is the positive value of cos ⁡ 1/2 x, in simplest radical form with a rat...