Proof of Cos2x Equation
Based on ABC triangle with hypotenuse 1 unit, we can prove the equation of cos2x = 2.cosx² - 1 = cosx² - sinx² = 1 – 2.sinx² as follows.
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Based on ABC triangle with hypotenuse 1 unit, we can prove the equation of cos2x = 2.cosx² - 1 = cosx² - sinx² = 1 – 2.sinx² as follows.
Published Date:
May 01, 2020
Updated Date:
December 12, 2023