The cosine of 2x can be found using the double angle identity for cosine. The double angle identity states that cos(2x) = cos^2(x) – sin^2(x).
Using this identity, we can rewrite cos(2x) as follows:
cos(2x) = cos^2(x) – sin^2(x)
So, the value of cos(2x) is equivalent to the difference between the square of the cosine of x and the square of the sine of x.
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