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![sin^{2} [\frac{\pi }{8} + \frac{Ф}{2} ] - sin^{2} [\frac{\pi}{8} - \frac{Ф}{2} ] = \frac{1}{\sqrt{2} } sin Ф](https://tex.z-dn.net/?f=sin%5E%7B2%7D+%5B%5Cfrac%7B%5Cpi+%7D%7B8%7D+%2B+%5Cfrac%7B%D0%A4%7D%7B2%7D+%5D+-+sin%5E%7B2%7D+%5B%5Cfrac%7B%5Cpi%7D%7B8%7D+-+%5Cfrac%7B%D0%A4%7D%7B2%7D+%5D+%3D+%5Cfrac%7B1%7D%7B%5Csqrt%7B2%7D+%7D+sin+%D0%A4 "sin^{2} [\frac{\pi }{8} + \frac{Ф}{2} ] - sin^{2} [\frac{\pi}{8} - \frac{Ф}{2} ] = \frac{1}{\sqrt{2} } sin Ф")
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