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19Anita19
@19Anita19
July 2022
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3.2. Чему равно значение выражения [tex] cos^{2} 15 [/tex]°-[tex] sin^{2} 15[/tex]°?
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kirichekov
Verified answer
Cos²15°-sin²15°=cos(2*15°)=cos30°=(
√3)/2
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Verified answer
Cos²15°-sin²15°=cos(2*15°)=cos30°=(√3)/2