This is usually expressed as a percentage. Relative Risk Reduction (RRR) = ( (ARC - ART) / ARC) x 100 Where: ARC = Number of events in control group / Number of people in

According to the power reducing formula for the sine, we have sin² (x) = (1 - cos (2x)) / 2. In our case, this translates to sin² (15°) = (1 - cos (2 * 15°)) / 2 = (1 - cos (30°)) / 2.

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