Ответ:
[tex]cos ({22.5})^{2} - sin({22.5})^{2}[/tex]
За формулой
[tex]cos( {t}^{2} ) - sin( {t}^{2} ) = cos2t[/tex]
[tex]cos ({22.5})^{2} - sin({22.5})^{2} = cos45 = \frac{ \sqrt{2} }{2} [/tex]
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Ответ:
[tex]cos ({22.5})^{2} - sin({22.5})^{2}[/tex]
За формулой
[tex]cos( {t}^{2} ) - sin( {t}^{2} ) = cos2t[/tex]
[tex]cos ({22.5})^{2} - sin({22.5})^{2} = cos45 = \frac{ \sqrt{2} }{2} [/tex]