power reducing: cos^2(x)
(1+cos2x)/2
Using the trigonometric identity power reducing formula, we reduce the power of cosine to get:
cos^2(x) = (cos(x))^2 = (1 + cos(2x))/2
Therefore, the power reducing formula for cos^2(x) states that it can be expressed in terms of cos(2x) by adding 1 to it and dividing the sum by 2.
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