Найдите значение выражения, логарифмы
45°
[tex] ( \sqrt{3 log_{7} \sqrt[4]{7} - cos^{2}45 } )^{-2} [/tex]
45°
[tex] ( \sqrt{3 log_{7} \sqrt[4]{7} - cos^{2}45 } )^{-2} [/tex]
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1. cos45°=√2/2. cos²45°=(√2/2)²=2/4=1/22.
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ответ: 4