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Trigonometry Angles at Pi/8 is a document available to read on EtoBox.
This document discusses trigonometric angle values for pi/8 in terms of radicals. It expresses the sine, cosine, and tangent of pi/8 as square roots of expressions containing 2. It then checks if the square roots can be simplified and finds that the square root of 2/2 can be simplified to 1/√2.
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