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July 2022
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Найдите значение выражения ctga-3cos2 a-3sin2 а, если tga = 2.
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sedinalana
Verified answer
Tga=2
ctga=1/tga=1/2
ctga-3cos²a-3sin²a=ctga-3(cos²a+sin²a)=ctga-3=1/2-3=-2,5
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Verified answer
Tga=2ctga=1/tga=1/2
ctga-3cos²a-3sin²a=ctga-3(cos²a+sin²a)=ctga-3=1/2-3=-2,5