Найдите значение выражения:
[tex] \sqrt{32} cos^{2} \frac{13pi}{8} - \sqrt{32} sin^{2} \frac{13pi}{8} [/tex]
[tex] \sqrt{32} cos^{2} \frac{13pi}{8} - \sqrt{32} sin^{2} \frac{13pi}{8} [/tex]
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