The value of sin^2 pi/8 + sin^2 3pi/8 + sin^2 5pi/8 + sin^2 7pi/8 is (1) 2 ( 2) 0 (3) 1 (4) none of these - Sarthaks eConnect | Largest Online Education Community
The triangle with angles π/8 and π/2 unfolds into a regular octagon. | Download Scientific Diagram
quantum state - How do we achieve mathematically that the probability that Eve learns $x$ is $\cos^{2}\left ( \frac{\pi }{8} \right )$? - Quantum Computing Stack Exchange
Prove that cos^(2)(pi/8-A/2)-cos^(2)(pi/8+A/2) [1-sin^(2)(pi/8-A/2)]